This study compared changes in hippocampal volume over one year in patients experiencing their first episode of psychosis (FEP) taking different second-generation antipsychotics. Specifically, it compared patients taking aripiprazole to those taking risperidone/paliperidone, olanzapine, or who refused antipsychotics. MRI scans were conducted at baseline and one year for 62 FEP patients and 44 healthy controls. Results showed no significant differences between groups in demographic factors. As expected, those who refused antipsychotics spent the least amount of time on medication and had the lowest adherence rates. Statistical analyses were conducted to examine changes in hippocampal volume and symptoms between the groups over time.
What’s next: The future of non-invasive neurotechnologySharpBrains
(Session held at the 2014 SharpBrains Virtual Summit; October 28-30th, 2014)
3-4pm. What’s next: The future of non-invasive neurotechnology
- Dr. Bruce Cuthbert, Director of Adult Translational Research and Treatment Development at the NIMH
- Charles Fisher, President of Fisher Wallace Laboratories
- Chair: James Cavuoto, Editor and Publisher at Neurotech Reports
Learn more here:
http://sharpbrains.com/summit-2014/agenda/
586 Stahl B, et al. J Neurol Neurosurg Psychiatry 2018;89586–.docxtroutmanboris
586 Stahl B, et al. J Neurol Neurosurg Psychiatry 2018;89:586–592. doi:10.1136/jnnp-2017-315962
ReseaRch papeR
Efficacy of intensive aphasia therapy in patients with
chronic stroke: a randomised controlled trial
Benjamin stahl,1,2,3,4 Bettina Mohr,5 Verena Büscher,6 Felix R Dreyer,6
Guglielmo Lucchese,2,6 Friedemann pulvermüller6,7
Cognitive neurology
To cite: stahl B, Mohr B,
Büscher V, et al. J Neurol
Neurosurg Psychiatry
2018;89:586–592.
► additional material is
published online only. To view
please visit the journal online
(http:// dx. doi. org/ 10. 1136/
jnnp- 2017- 315962).
1Department of Neurology,
charité Universitätsmedizin
Berlin, campus Mitte, Berlin,
Germany
2Department of Neurology,
Universitätsmedizin Greifswald,
Greifswald, Germany
3Department of Neurophysics,
Max planck Institute for human
cognitive and Brain sciences,
Leipzig, Germany
4psychologische hochschule
Berlin, Berlin, Germany
5Department of psychiatry,
charité Universitätsmedizin
Berlin, campus Benjamin
Franklin, Berlin, Germany
6Department of philosophy and
humanities, Brain Language
Laboratory, Freie Universität
Berlin, Berlin, Germany
7Berlin school of Mind and
Brain, humboldt-Universität zu
Berlin, Berlin, Germany
Correspondence to
Dr Benjamin stahl, charité
Universitätsmedizin Berlin,
Department of Neurology,
charitéplatz 1, 10117 Berlin,
Germany; benjamin. [email protected]
charite. de
Received 1 March 2017
Revised 13 November 2017
accepted 14 November 2017
published Online First
22 December 2017
AbsTrACT
Objective Recent evidence has fuelled the debate
on the role of massed practice in the rehabilitation of
chronic post-stroke aphasia. here, we further determined
the optimal daily dosage and total duration of intensive
speech-language therapy.
Methods Individuals with chronic aphasia more
than 1 year post-stroke received Intensive Language-
action Therapy in a randomised, parallel-group,
blinded-assessment, controlled trial. participants
were randomly assigned to one of two outpatient
groups who engaged in either highly-intensive
practice (Group I: 4 hours daily) or moderately-
intensive practice (Group II: 2 hours daily). Both
groups went through an initial waiting period and
two successive training intervals. each phase lasted
2 weeks. co-primary endpoints were defined after
each training interval.
results Thirty patients—15 per group—completed the
study. a primary outcome measure (aachen aphasia Test)
revealed no gains in language performance after the
waiting period, but indicated significant progress after
each training interval (gradual 2-week t-score change
[cI]: 1.7 [±0.4]; 0.6 [±0.5]), independent of the intensity
level applied (4-week change in Group I: 2.4 [±1.2]; in
Group II: 2.2 [±0.8]). a secondary outcome measure
(action communication Test) confirmed these findings
in the waiting period and in the first training interval.
In the second training interval, however, only patients
wi.
"Validity, Reliability and Factor Structure of the Mindfulness based Self-Efficacy Scale (MSES)", presented at the National conference of the New Zealand Psychological Society, 21 April 2012: Existing self-report questionnaires have been criticised for several reasons. Presents on a new self-report questionnaire to measure self-efficacy before, during and after mindfulness-based therapy or mindfulness training outside the therapy context. To try the MSES online and obtain instant results (at no cost), follow the link: http://www.mindfulness.net.au/mses
What’s next: The future of non-invasive neurotechnologySharpBrains
(Session held at the 2014 SharpBrains Virtual Summit; October 28-30th, 2014)
3-4pm. What’s next: The future of non-invasive neurotechnology
- Dr. Bruce Cuthbert, Director of Adult Translational Research and Treatment Development at the NIMH
- Charles Fisher, President of Fisher Wallace Laboratories
- Chair: James Cavuoto, Editor and Publisher at Neurotech Reports
Learn more here:
http://sharpbrains.com/summit-2014/agenda/
586 Stahl B, et al. J Neurol Neurosurg Psychiatry 2018;89586–.docxtroutmanboris
586 Stahl B, et al. J Neurol Neurosurg Psychiatry 2018;89:586–592. doi:10.1136/jnnp-2017-315962
ReseaRch papeR
Efficacy of intensive aphasia therapy in patients with
chronic stroke: a randomised controlled trial
Benjamin stahl,1,2,3,4 Bettina Mohr,5 Verena Büscher,6 Felix R Dreyer,6
Guglielmo Lucchese,2,6 Friedemann pulvermüller6,7
Cognitive neurology
To cite: stahl B, Mohr B,
Büscher V, et al. J Neurol
Neurosurg Psychiatry
2018;89:586–592.
► additional material is
published online only. To view
please visit the journal online
(http:// dx. doi. org/ 10. 1136/
jnnp- 2017- 315962).
1Department of Neurology,
charité Universitätsmedizin
Berlin, campus Mitte, Berlin,
Germany
2Department of Neurology,
Universitätsmedizin Greifswald,
Greifswald, Germany
3Department of Neurophysics,
Max planck Institute for human
cognitive and Brain sciences,
Leipzig, Germany
4psychologische hochschule
Berlin, Berlin, Germany
5Department of psychiatry,
charité Universitätsmedizin
Berlin, campus Benjamin
Franklin, Berlin, Germany
6Department of philosophy and
humanities, Brain Language
Laboratory, Freie Universität
Berlin, Berlin, Germany
7Berlin school of Mind and
Brain, humboldt-Universität zu
Berlin, Berlin, Germany
Correspondence to
Dr Benjamin stahl, charité
Universitätsmedizin Berlin,
Department of Neurology,
charitéplatz 1, 10117 Berlin,
Germany; benjamin. [email protected]
charite. de
Received 1 March 2017
Revised 13 November 2017
accepted 14 November 2017
published Online First
22 December 2017
AbsTrACT
Objective Recent evidence has fuelled the debate
on the role of massed practice in the rehabilitation of
chronic post-stroke aphasia. here, we further determined
the optimal daily dosage and total duration of intensive
speech-language therapy.
Methods Individuals with chronic aphasia more
than 1 year post-stroke received Intensive Language-
action Therapy in a randomised, parallel-group,
blinded-assessment, controlled trial. participants
were randomly assigned to one of two outpatient
groups who engaged in either highly-intensive
practice (Group I: 4 hours daily) or moderately-
intensive practice (Group II: 2 hours daily). Both
groups went through an initial waiting period and
two successive training intervals. each phase lasted
2 weeks. co-primary endpoints were defined after
each training interval.
results Thirty patients—15 per group—completed the
study. a primary outcome measure (aachen aphasia Test)
revealed no gains in language performance after the
waiting period, but indicated significant progress after
each training interval (gradual 2-week t-score change
[cI]: 1.7 [±0.4]; 0.6 [±0.5]), independent of the intensity
level applied (4-week change in Group I: 2.4 [±1.2]; in
Group II: 2.2 [±0.8]). a secondary outcome measure
(action communication Test) confirmed these findings
in the waiting period and in the first training interval.
In the second training interval, however, only patients
wi.
"Validity, Reliability and Factor Structure of the Mindfulness based Self-Efficacy Scale (MSES)", presented at the National conference of the New Zealand Psychological Society, 21 April 2012: Existing self-report questionnaires have been criticised for several reasons. Presents on a new self-report questionnaire to measure self-efficacy before, during and after mindfulness-based therapy or mindfulness training outside the therapy context. To try the MSES online and obtain instant results (at no cost), follow the link: http://www.mindfulness.net.au/mses
Similar to The effect of second-generation antipsychotics on hippocampal volume in first episode of psychosis: longitudinal study (20)
'Non-pharmacological management in dementia' is really nice article published in British Journal of Psychiatry Advances. It gives basic idea about non pharmacological management in all forms of dementia for Behavioral and psychological symptoms of dementia.
This presentation gives detailed description of symptoms of catatonia with its etiologies and differential diagnoses. It should help to differentiate catatonia in neurological and psychiatric disorders.
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Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
New Drug Discovery and Development .....NEHA GUPTA
The "New Drug Discovery and Development" process involves the identification, design, testing, and manufacturing of novel pharmaceutical compounds with the aim of introducing new and improved treatments for various medical conditions. This comprehensive endeavor encompasses various stages, including target identification, preclinical studies, clinical trials, regulatory approval, and post-market surveillance. It involves multidisciplinary collaboration among scientists, researchers, clinicians, regulatory experts, and pharmaceutical companies to bring innovative therapies to market and address unmet medical needs.
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
Basavarajeeyam is a Sreshta Sangraha grantha (Compiled book ), written by Neelkanta kotturu Basavaraja Virachita. It contains 25 Prakaranas, First 24 Chapters related to Rogas& 25th to Rasadravyas.
- Video recording of this lecture in English language: https://youtu.be/kqbnxVAZs-0
- Video recording of this lecture in Arabic language: https://youtu.be/SINlygW1Mpc
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
The effect of second-generation antipsychotics on hippocampal volume in first episode of psychosis: longitudinal study
1. The effect of second-generation
antipsychotics on hippocampal
volume in first episode of
psychosis: longitudinal study
Michael Bodnar, Ashok K. Malla, Carolina Makowski, M.
Mallar Chakravarty, Ridha Joober, Martin Lepage
British Journal of Psychiatry Open Mar 2016, 2 (2) 139-146
Presenter- Kapil Kulkarni
Guided by – Dr. Basavaraja Papanna , Consultant Psychiatrist, Herrick
House, NEP NHS Trust, Colchester, UK
2. Background
• Most consistent neuroimaging findings in Schizophrenia and related
psychosis is marked decrease in –
1. Whole-brain volume
2. Whole-brain grey matter
3. Frontal grey and white matter
• One study- Reduced grey matter hippocampus- poorer outcome
• Identifying a protective molecule-can alter the course of treatment and
outcome.
• A recent meta-analysis- clozapine leads to less evident loss and, in some
cases, actually increased whole-brain gray matter.
• Aripiprazole- improved memory performance in schizophrenia. But any
positive structural brain alterations, particularly in the hippocampus is
uncertain.
3. This study…
• Compared hippocampal grey matter changes over 1-year period in people
with a first episode of psychosis (FEP) taking aripiprazole with those taking
other second-generation antipsychotics and with non-clinical controls.
• Hypothesis- Patient taking aripiprazole would show an increase in
hippocampal volume.
4. This study…
• At Douglas Mental Health University Institute in Montreal, Canada.
• Approved by the Research Ethics Board of the Douglas Mental Health
University Institute and the McGill University Faculty of Medicine.
• Patients admitted and treated at PEPP between January 2004 and June
2014
• PEPP is a specialized early intervention service at the Douglas Mental Health University Institute in
Montreal, Canada. It serves 14- to 35-year-olds with a diagnosis of affective or non-affective psychosis who
have had no more than 1 month of previous antipsychotic treatment; without organic brain damage, a
pervasive developmental disorder, an IQ below 70, or epilepsy; and do not have substance-induced
psychosis.
5. Methods
Participants
• Eligibility-
1. Individuals admitted and treated at the Prevention and Early
Intervention Program for Psychoses (PEPP)
2. Aged 18–30 years
3. No history of neurological disease or head trauma causing loss of
consciousness
• Diagnoses-
1. SCID
2. Validated through consensus with a staff research psychiatrist
6. • A control group- Recruited through advertisements in local newspapers
• Exclusion criteria-
1. Individual with current or past history of any Axis I disorder, any neurological disease, head trauma
causing loss of consciousness
2. First-degree relative diagnosed with schizophrenia or a related spectrum disorder.
• Consent- written informed consent from all participants.
Methods
Participants
7. • Treatment of FEP in PEPP-
1. A comprehensive approach- Pharmacotherapy + Psychological therapies
2. Pharmacotherapy for all patients- with a second-generation
antipsychotic (olanzapine, risperidone, paliperidone, quetiapine or
aripiprazole).
3. If no optimal response within 4–6 weeks or significant side effects
emerge- change to a different antipsychotic
4. Patients who refuse pharmacotherapy- psychosocial interventions
Methods
Treatment settings
8. Methods
Clinical and sociodemographic data
• Clinical data were collected near entry and at months 1, 2, 3, 6, 9, 12 and
18
• Data obtained at baseline-
1. Education level (years completed)
2. Parental socioeconomic status
3. Handedness
4. Duration of untreated psychosis (DUP)
5. Duration of untreated illness (DUI)
6. Full-scale IQ
• Type and dosage of antipsychotic prescribed- Noted at each assessment
and converted into chlorpromazine equivalents.
9. • Changes in total positive (SAPS) and negative symptoms (SANS) over the
period of time were noted.
• Evaluators, who are not involved in patient treatment, have established inter-class correlations of 0.89 and
0.71 on the SAPS and SANS respectively
• Percentage of time spent in positive symptom remission during the
interscan interval was also calculated. (positive remission was defined as mild or less on all
four global scores of the SAPS).
Methods
Clinical and sociodemographic data
10. Methods
Longitudinal Structural MRI data
acquisition and processing
• Scanning- At the Montreal Neurological Institute
• For each participant, T1 MR images were acquired using a 3D gradient-
echopulse sequence
• Scan 1 – Baseline
• Scan 2 – After 1 year
• Same scanner and parameters were used at both Scan 1 and Scan 2
• 88 people with FEP and 46 controls completed both scans
11. • Whole hippocampal volume- FreeSurfer v5.3
• T1 images were automatically processed in using the hippocampal-subfields and longitudinal streams.
• Whole hippocampal volume- MAGeT-Brain (Multiple Automatically
Generated Templates) algorithm.
• The T1 images were reprocessed using an independent pipeline, the, based on subfield definitions derived
from the Chakravarty Laboratory
• Hippocampal volumes derived from MAGeT-Brain were found to strongly
overlap with those derived using FreeSurfer.
Methods
Longitudinal Structural MRI data
acquisition and processing
12. • Subfield volumes derived from each technique were summed to obtain
left- and right-side hippocampal volumes
• Scan 1 volumes were subtracted from Scan 2 volumes to see change over
time
• Finally, total intracranial volume (TIV) was estimated using FreeSurfer for
patients and controls.
Methods
Longitudinal Structural MRI data
acquisition and processing
13. Methods
Antipsychotic treatment subgroups
• Subgroups of patients done based on the type of antipsychotic taken
during the interscan interval.
• To be considered for a subgroup, a patient had to take one type of an
antipsychotic for a minimum of 6 consecutive months with an average
adherence above 50%.
• The chosen time period of 6 months- justified by a seminal paper written by Lieberman and colleagues-
median discontinuation for antipsychotics was around the 6-month period, confirmed by an independent
trial
• Medication adherence protocol - Validated protocol based on composite information from Patient Family
members Treating team. This has been shown to be as efficacious as pill-counting
0=never (0%)
1=very infrequently (1–25%)
2=sometimes (26–50%)
3=quite often (51–75%)
4=fully (76–100%)
14. • Patients who refused antipsychotic treatment or had less than 50%
adherence (score of 2 or less) were categorised into the ‘refused-
antipsychotics (APs)’ subgroup.
Methods
Antipsychotic treatment subgroups
15. Methods
Sample size
• Of the 88 people with FEP with two MRI scans, 26 were removed
due to:
1. Missing key clinical data (n=1)
2. Technical/processing errors (n=1)
3. Concurrent antidepressant use (n=5)
4. Polypharmacy of antipsychotics (n=9)
5. Insufficiently sized subgroups (n=10) Those taking quetiapine (n=5), ziprasidone (n=3), haloperidol (n=1)
and asenapine (n=1) were excluded as any results would have been uninterpretable due to small
subgroup sizes.
• Two controls were also removed due to processing errors
• The final sample size- 62 people with FEP and 44 controls
16. • Final FEP subgroups included(n=62):
1. Risperidone/paliperidone (n=24) Paliperidone is the active metabolite of risperidone and has been
shown to have a similar efficacy and treatment profile
2. Olanzapine (n=12)
3. Aripiprazole (n=13)
4. Refused-APs (n=13)
• Final Controls (n=44)
Methods
Final Antipsychotic subgroups
17. • All analyses were performed by using SPSS 22 and were two-tailed with a
critical P-value of 0.05, except where noted.
Methods
Statistical Analyses
18. • Sample characteristics were analysed by using
1. One-way ANOVAs - Continuous variables
2. Kruskall–Wallis H-tests- Nominal variables
3. Median tests- DUP and DUI
Methods
Statistical Analyses
19. Methods
Statistical Analyses
• Hippocampal volumes from FreeSurfer and MAGeT-Brain analysis-
Repeated measure ANOVA
1. ‘Group’ as the between-group factor- (risperidone/paliperidone, olanzapine, aripiprazole, refused-APs,
controls)
2. ‘Side’ as the within-group factor
(left, right)
• Analyses were one-tailed and included the following covariates:
1. Age at Scan 1
2. Age at Scan 2
3. Education
4. Gender
5. Handedness
6. Overall antipsychotic dosage per month
7. TIV
20. • SAPS and SANS totals (at baseline, month 6, month 12, month 18) were
analysed- Generalised estimating equations (GEEs)
• (significant P-value was set to 0.012) (0.05/4 time points)
• GEE is a multivariate extension of the generalised linear model to analyse
repeated measurements or other correlated observations.
• Advantages of GEE:
1. Examining a large, longitudinal data-set
2. Accommodate violations of normality (homogeneity of variance)
3. Accommodate incomplete data based on population quantities and data distributions (allows the
exclusion of a single missing observation without having to exclude an entire subject)
Methods
Statistical Analyses
21. Results
Sample Characteristics
• For all participants, there were no significant between-group differences in
age at Scan 1, age at Scan 2, parental socioeconomic status, gender,
handedness, full-scale IQ, interscan interval or TIV; however, there were
significant differences regarding education, with controls completing the
most years.
• Among the FEP subgroups, there were no significant differences in the age
at onset of psychosis, diagnosis, time from PEPP entry to Scan 1, DUP, DUI
or antipsychotic dosage prescribed; however, there were significant
differences regarding time spent on antipsychotic and overall medication
adherence.
• As expected, the refused-APs subgroup spent the lowest time taking the
prescribed antipsychotic (average of 3.4 v. 11.9 months for the other three
subgroups) and had the lowest adherence (average of 35% v. 88% for the
other three subgroups). See Tables 1 and 2 for data and results.
22. Variable Risperid
one/pali
peridone
(n=24)
Olanzapine
(n=12)
Aripiprazole
(n=13)
Refused
-APs
(n=13)
Controls
(n=44)
Statistic d.f. P
Age at
onset,
years:
mean (s.d.)
22.5
(3.5)
22.3 (3.2) 23.3 (4.1) 24.3
(3.1)
– F=0.94 3.57 0.429
Parental
SES,
mean
(s.d.)a
3.3 (1.1) 3.0 (1.1) 2.9 (0.8) 3.1 (0.9) 3.3 (0.8) χ2=4.45 4 0.348
Educatio
n, mean
(s.d.)b
11.1
(2.4)
12.7 (2.3) 12.5 (2.0) 12.7
(2.4)
14.3 (2.5) F=7.22 4.101 <0.001
Full-scale
IQ, mean
(s.d.) [n]
96.5
(14.6)
100.8 (16.5) 105.5 (13.9) 105.5
(12.5)
111.1
(14.6) [42]
F=3.05 4.95 0.233
Table 1 General sample characteristics
APs, antipsychotics; DUP, duration of untreated psychosis; DUI, duration of untreated illness; SES, socioeconomic status.
↵a Hollingshead parental SES: 1=high SES and 5=low SES.
↵b Number of school years completed. Controls>all subgroups (all P<0.042).
↵c Final diagnosis obtained after 1 year of treatment, not initial diagnosis at entry.
23. Variable Risperidon
e/paliperid
one (n=24)
Olanzapine
(n=12)
Aripiprazole
(n=13)
Refused-
APs
(n=13)
Controls
(n=44)
Statistic d.f. P
Right
handed, n
(%)
17 (70.8) 10 (83.3) 12 (92.3) 9 (69.2) 38 (86.4) χ2=4.75 4 0.314
Male,n (%) 18 (75.0) 6 (50.0) 10 (76.9) 9 (69.2) 26 (59.1) χ2=3.84 4 0.429
Non-
affective
disorder, n
(%)c
23 (95.8) 8 (66.7) 10 (76.9) 10 (76.9) – χ2=5.54 3 0.136
DUP,
weeks:
median [n]
18.6 [23] 17.8 12.8 [10] 20.6 [11] – χ2=2.08 3 0.556
DUI,
weeks:
median [n]
394.6 200.9 207.4 [9] 255.3 [11] – χ2=5.87 3 0.118
Table 1 General sample characteristics
APs, antipsychotics; DUP, duration of untreated psychosis; DUI, duration of untreated illness; SES, socioeconomic status.
↵a Hollingshead parental SES: 1=high SES and 5=low SES.
↵b Number of school years completed. Controls>all subgroups (all P<0.042).
↵c Final diagnosis obtained after 1 year of treatment, not initial diagnosis at entry.
24. Variable Risperidone
/paliperidon
e (n=24)
Olanzapine
(n=12)
Aripiprazole
(n=13)
Refused-
APs (n=13)
Controls
(n=44)
Statistic d.f. P
Age at Scan
1, years: mean
(s.d.)
23.7 (3.6) 23.4 (3.3) 23.5 (4.2) 25.9 (3.1) 23.9 (3.4) F=1.15 4.101 0.336
Age at Scan
2, years: mean
(s.d.)
24.9 (3.6) 24.5 (3.3) 24.6 (4.2) 27.0 (3.1) 24.9 (3.4) F=1.15 4.101 0.339
From entry to
Scan 1,
months: mean
(s.d.)
4.2 (2.0) 3.9 (2.3) 4.4 (1.7) 3.8 (1.4) – F=0.30 3.58 0.826
Interscan
interval,
months: mean
(s.d.)
13.7 (1.4) 13.0 (1.3) 12.6 (1.3) 13.0 (1.4) 12.8 (1.3) F=2.44 4.101 0.052
Time spent
on
antipsychotic,
months: mean
(s.d.)a
11.6 (2.9) 12.1 (1.9) 12.1 (1.0) 3.4 (3.2) – F=39.01 3.58 <0.001
• Table 2: Sample characteristics related to neuroimaging data and interscan interval
• APs, antipsychotics; CPZ, chlorpromazine; SAPS, Scale for the Assessment of Positive Symptoms; SANS, Scale for the Assessment of
Negative Symptoms.
• ↵a Number of months that antipsychotic was taken for during interscan interval. Refusal<all subgroups (all P<0.001).
• ↵b Average prescribed dosage in CPZ equivalents (mg/day) per month during interscan interval.
• ↵c Average overall medication adherence during interscan interval. Refusal<all subgroups (all P<0.001).
• ↵d Percentage of time spent in positive symptom remission during interscan interval.
• ↵e Change in symptom totals during interscan interval; a negative value indicates a decrease in total (improvement) from Scan 1 to Scan
2.
25. Variable Risperidone/
paliperidone
(n=24)
Olanzapine
(n=12)
Aripiprazole
(n=13)
Refused-APs
(n=13)
Controls
(n=44)
Statistic d.f. P
CPZ/month, mean
(s.d.)b
154.6 (103.8) 172.8 (97.4) 150.3 (103.0) 70.8 (96.3) – F=2.67 3.58 0.056
Adherence, %:
mean (s.d.)c
83.3 (18.7) 91.8 (16.0) 89.2 (16.2) 35.1 (35.6) – F=18.71 3.58 <0.001
Time in
remission, %:
mean (s.d.)d
70.6 (33.5) 67.9 (38.2) 73.9 (35.1) 66.1 (39.1) – F=0.12 3.58 0.950
Change in SAPS
total, mean (s.d.)e
0.38 (9.86) 1.75 (17.60) –0.85 (7.14) 2.15 (10.62) – F=0.19 3.58 0.904
Change in SANS
total, mean (s.d.)e
–0.50 (15.08) –2.17 (4.57) –8.00 (15.32) –3.46 (14.26) – F=0.88 3.58 0.458
Intracranial
volume, cm3:
mean (s.d.)
1705 (135) 1679 (177) 1758 (163) 1683 (188) 1697
(176)
F=0.47 4.101 0.760
26. • Over the interscan interval, there were no significant subgroup differences
in the change of positive symptom totals (SAPS) and negative symptom
totals (SANS) (Table 2).
• In addition, there were no significant subgroup differences in the amount
of time spent in positive symptom remission (Table 2).
Results
Symptom total (SAPS/SANS) changes and
remission
27. • For SAPS total, there was a significant main effect of ‘time’ (Wald χ2=188.24,
df=3, P<0.001) (Fig. 1).
• All patients with FEP displayed a significant decrease from baseline to
month 6 (P<0.001) with no changes thereafter (all P’s>0.273).
• For SANS total, there was a significant main effect of ‘time’ (Wald χ2=27.39,
df=3, P<0.001) and of ‘group’ (Wald χ2=11.14, df=3, P=0.011) (Fig. 1).
• All patients with FEP displayed a significant decrease from baseline to
month 6 (P<0.001) with minimal changes thereafter (all P’s>0.102).
• The risperidone/paliperidone subgroup had a higher total overall
compared with the other three subgroups (all P’s<0.041); no other subgroup
differences were apparent (all P’s>0.354).
Results
Symptom total (SAPS/SANS) changes and
remission
28. Fig. 1
Positive and negative symptom totals among first-episode psychosis (FEP) subgroups.
The error bars represent standard error. All people with FEP showed a significant
improvement in both measures over the first 6 months of treatment. The
risperidone/paliperidone (Risp/Palp) subgroup had higher negative symptoms overall
compared with the other three subgroups.
SAPS, Scale for the Assessment of Positive Symptoms; SANS, Scale for the Assessment of Negative Symptoms; Olanz,
29. Results
Hippocampal Volume change
• For FreeSurfer, the repeated-measures
ANCOVA revealed a significant between-group
effect (F=2.88, P=0.014).
• Aripiprazole subgroup had a significantly
larger increase in total bilateral volume
compared with the risperidone/paliperidone
subgroup (P=0.008, Cohen’s d=0.92), the
olanzapine subgroup (P=0.005, Cohen’s d=1.38),
the refused-APs subgroup (P=0.005, Cohen’s
d=1.30) and the controls (P=0.002, Cohen’s d=1.20).
30. Fig. 2
Change in grey matter volume in the hippocampus for first-episode psychosis (FEP) subgroups and
controls.
The error bars represent standard error. The aripiprazole subgroup displayed a significantly larger
change in bilateral hippocampal volume compared with all FEP subgroups and controls for
volumes derived from both FreeSurfer and MAGeT-Brain.
Risp/Palip, risperidone/paliperidone; Olanz, olanzapine; APs, antipsychotics.
31.
32.
33. Results
Correlations involving changes over
interscan interval
• No significant correlations between hippocampal volume change and SAPS
and SANS total changes (Table 3).
• Exploring only within the aripiprazole subgroup (n=13), bivariate
correlations were also not significant:
between SAPS total change and hippocampal volume change for
FreeSurfer volumes (r=0.376, P=0.206) or for MAGeT-Brain volumes (r=0.291,
P=0.334)
between SANS total change and hippocampal volume change for
FreeSurfer volumes (r=–0.260, P=0.391) or for MAGeT-Brain volumes (r=–0.203,
P=0.506)
or between total antipsychotic dosage and hippocampal volume change
for FreeSurfer volumes (r=–0.315, P=0.294) or for MAGeT-Brain volumes (r=–0.236,
P=0.268)
34.
35. Results
Correlation at scan1 and scan 2
• Partial correlations, controlling for subgroup, between SAPS total
and hippocampal volumes at both Scan 1 and at Scan 2 revealed no
significant associations for FreeSurfer volumes (all Ps>0.467) or for
MAGeT-Brain volumes (all P’s>0.643).
• At Scan 1 partial correlations with SANS total revealed significant
negative associations with right (r=–0.286, P=0.025) and total (r=–0.267,
P=0.037) FreeSurfer volumes; but there were no significant
correlations found for the MAGeT-Brain volumes (all P’s>0.175).
• At Scan 2, there were no significant correlations between SANS
total and hippocampal volumes for either FreeSurfer volumes (all
P’s>0.420) or for MAGeT-Brain volumes (all P’s>0.818) (supplementary
Table DS2)
36.
37. Discussion
• This study observed- People with FEP taking aripiprazole displayed a
significant increase in bilateral hippocampal volume over a 1-year follow-
up period
• This finding was obtained from two independent neuroimaging pipelines
FreeSurfer v5.3 and MAGeT-Brain.
• Aripiprazole is as effective as other antipsychotics with respect SAPS and
SANS reduction, and time spent in remission.
• So aripiprazole may be a good treatment option with an added benefit of
enhanced hippocampal plasticity and increasing volume which may affect
future clinical status.
38. Discussion
Aripiprazole and augmenting hippocampal
growth
• Adult human brain is capable of neurogenesis from neural stem cells, but
this growth is limited to the hippocampus.
• This phenomenon attracted more attention recently as it may play role in
hippocampal-dependent learning and memory.
• So hippocampal growth is possible if correct pathways are triggered.
• Aripiprazole- a dopamine/serotonin system stabilizer.
• Its partial agonist to D2, 5HT1A and 5HT7 receptors and antagonist at D1,
5HT2A and 5HT6 receptors.
39. • Aripiprazole in animals models of depression and schizophrenia-
i. Better memory function
ii. Increased dopamine
iii. Brain-derived neurotrophic factor (BDNF) in hippocampus.
• Mouse model involving neuronal loss in the dentate gyrus- Aripiprazole
increased proliferation of newly generated neurons
• In humans, people with schizophrenia- improved memory function with
aripiprazole treatment.
Discussion
Aripiprazole and augmenting hippocampal
growth
40. • A functional MRI study in people with schizophrenia using aripiprazole-
improved working memory.
• All above findings- aripiprazole may be related to an overall improvement
of memory function as well as inducing neuroanatomical alterations in
memory system structures, especially hippocampus.
Discussion
Aripiprazole and augmenting hippocampal
growth
41. • Exact mechanisms is unclear- but probably 5-HT1A agonism may help to
induce adult neurogenesis.
(Antipsychotics with 5-HT1A agonism include aripiprazole, ziprasidone, clozapine, asenapine
and Lurasidone)
• One study showed that people with reduced BDNF secretion- displayed
poorer memory performance along with abnormal hippocampal
functioning.
• Interestingly, aripiprazole has been shown to enhance BDNF levels.
Discussion
Aripiprazole and augmenting hippocampal
growth
42. • Taken together, BDNF secretion and 5-HT1A agonistic action of
aripiprazole, could favourably enhance adult neurogenesis in the
hippocampus.
• Future studies are warranted to explore the underlying mechanisms of
adult neurogenesis with aripiprazole.
Discussion
Aripiprazole and augmenting hippocampal
growth
43. Discussion
Symptomatic changes in relation to
hippocampal volume change
• This study- changes in hippocampal volume over the interscan interval did
not significantly correlate with changes in either positive or negative
symptoms or with the total amount of antipsychotics taken (in
chlorpromazine equivalents).
• This suggests that the change in hippocampal volume with aripiprazole,
was not an effect related to symptomatic change over time or to the
amount of medication taken.
• So this claim should be verified in a future controlled study.
44. • Moreover, this study found no relationship between positive symptoms
and hippocampal volumes at Scan 1 or at Scan 2 using both FreeSurfer and
MAGeT-Brain.
• However, this study did find a negative correlation between right
hippocampal volume and negative symptoms total at Scan 1, using
FreeSurfer volumes only.
Discussion
Symptomatic changes in relation to
hippocampal volume change
45. Discussion
Symptomatic changes in relation to
hippocampal volume change
• These findings are noteworthy, as previous studies using FreeSurfer have
noted significant correlations with both positive and negative symptoms in
hippocampal subfield analyses.
• For the positive symptoms, one study found these associations particular to the CA1 and CA2/3 subfields,
another study found the associations particular to presubiculum and sublicuum subfields and the final
study found no such relationship with hippocampal volumes.
• Of note, the study by Mathew et al explored hippocampal volumes in 886 participants across a six-site
collaboration and noted an intersite scanning variation that was controlled for using a covariate.
• Although the power was evident in this study with such a large sample size, results may have been
confounded by the varying scanners that were employed.
• An interesting suggestion would be to re-analyse their data using another
pipeline such as MAGeT-Brain to help identify whether the issue was with
FreeSurfer itself.
46. • Finally, this results suggested that smaller hippocampal volumes at Scan 1
were related to worse negative symptoms, a finding supported by Kawano
et al.
• In fact, this group showed the relationship was specific with CA2/3 and CA4/dentate gyrus subfield
volumes.
• Although we did not explore subfield volumes, it would appear there are specific subfields that may
be related to symptomology.
• As such, we further suggest that any future study exploring the
relationship between aripiprazole and hippocampal growth should explore
for changes within the subfields.
Discussion
Symptomatic changes in relation to
hippocampal volume change
47. • This study, although not directly addressing cognitive benefits, does show
that prolonged treatment with aripiprazole increased hippocampus
volume in people with FEP.
Discussion
Symptomatic changes in relation to
hippocampal volume change
48. Conclusion
Take home message
Aripiprazole as first line treatment in FEP
Symptomatic remission
+
Stimulation of neurogenesis in
hippocampus; helping repair
of dysfunctional brain circuits