Schizophrenia is a chronic mental disorder characterized by disturbances in thoughts, perceptions, emotions, and behaviors. It is marked by psychosis like delusions and hallucinations. The exact causes are unknown but genetics and brain chemistry imbalances are thought to play a role. Diagnosis involves symptoms lasting at least six months including two or more of delusions, hallucinations, disorganized speech or behavior. Treatment aims to minimize symptoms and involves antipsychotic medications as well as psychotherapy. First generation antipsychotics mainly block dopamine receptors while second generation drugs also target serotonin receptors, with fewer side effects. However, there is currently no cure for schizophrenia.
Schizophrenia is a group of severe brain disorders in which people interpret reality abnormally. Schizophrenia may result in some combination of hallucinations, delusions, and disordered thinking and behaviour.
Contrary to some popular belief, schizophrenia is not split personality or multiple personality. The word “schizophrenia” does mean “split mind,” but it refers to a disruption of the usual balance of emotions and thinking (Mayo, 2013).
Schizophrenia is a chronic condition, requiring lifelong treatment.
Schizophrenia is a chronic and severe mental disorder that affects how a person thinks, feels, and behaves. People with schizophrenia may seem like they have lost touch with reality. Although schizophrenia is not as common as other mental disorders, the symptoms can be very disabling.
SCHIZOPHRENIA:
slide 1: A long-term mental disorder of a type involving a breakdown in the relation between thought, emotion, and behavior, leading to faulty perception, inappropriate actions and feelings, withdrawal from reality and personal relationships into fantasy and delusion, and a sense of mental fragmentation.
slide 14: Types:
• Paranoid-type schizophrenia is characterized by delusions and auditory hallucinations (hearing voices that don't exist) but relatively normal intellectual functioning and expression of emotions. People with paranoid-type schizophrenia can exhibit anger, aloofness, anxiety, and can be argumentative.
• Disorganized-type schizophrenia is characterized by speech and behavior that are disorganized or difficult to understand, and flattening or inappropriate emotions. People with disorganized-type schizophrenia may laugh inappropriately for no apparent reason, make illogical statements, or seem preoccupied with their own thoughts or perceptions. Their disorganized behavior may disrupt normal activities, such as showering, dressing, and preparing meals.
• Undifferentiated-type schizophrenia is characterized by some symptoms seen in all of the above types, but not enough of any one of them to define it as another particular type of schizophrenia.
• Residual-type schizophrenia is characterized by a past history of at least one episode of schizophrenia, but the person currently has no "positive" symptoms (such as delusions, hallucinations, disorganized speech, or behavior). It may represent a transition between a full-blown episode and complete remission, or it may continue for years without any further psychotic episodes.
Catatonic Schizophrenia
This type of schizophrenia includes extremes of behavior, including:
Catatonic excitement - overexcitement or hyperactivity, in which the patient may mimic sounds (echolalia) or movements (achopraxia) around them.
Catatonic stupor - a dramatic reduction in activity in which the patient cannot speak, move or respond. Virtually all movements stops.
Conclusion
It is clear now, through the use of genetic linkage studies and microbiology, that schizophrenia does indeed have a biological explanation. However, the biological explanation is only part of the story. A yet unknown combination of intense stress, sociocultural situations, and cognitive processes may lead to the actual onset of schizophrenia aided by natural precursors. The most compelling explanation seems to be that a genetically inherited biological abnormality gives rise to hallucinations/delusions as a result of intense stress and eventually leads to other negative symptoms in reaction to the hallucinations/ delusions. At any rate, the current understanding of schizophrenia explains that the symptoms, however easily identifiable, are the result of a complex interaction between nature and nurture that can be treated adequately through the use of atypical anti psychotic drugs and psychotherapy.
This ppt will provide a complete information on the topic Depression. It Will also provide the types of depression, pathophysiology involved, causes, drugs used in Depression and its management.
Schizophrenia is a group of severe brain disorders in which people interpret reality abnormally. Schizophrenia may result in some combination of hallucinations, delusions, and disordered thinking and behaviour.
Contrary to some popular belief, schizophrenia is not split personality or multiple personality. The word “schizophrenia” does mean “split mind,” but it refers to a disruption of the usual balance of emotions and thinking (Mayo, 2013).
Schizophrenia is a chronic condition, requiring lifelong treatment.
Schizophrenia is a chronic and severe mental disorder that affects how a person thinks, feels, and behaves. People with schizophrenia may seem like they have lost touch with reality. Although schizophrenia is not as common as other mental disorders, the symptoms can be very disabling.
SCHIZOPHRENIA:
slide 1: A long-term mental disorder of a type involving a breakdown in the relation between thought, emotion, and behavior, leading to faulty perception, inappropriate actions and feelings, withdrawal from reality and personal relationships into fantasy and delusion, and a sense of mental fragmentation.
slide 14: Types:
• Paranoid-type schizophrenia is characterized by delusions and auditory hallucinations (hearing voices that don't exist) but relatively normal intellectual functioning and expression of emotions. People with paranoid-type schizophrenia can exhibit anger, aloofness, anxiety, and can be argumentative.
• Disorganized-type schizophrenia is characterized by speech and behavior that are disorganized or difficult to understand, and flattening or inappropriate emotions. People with disorganized-type schizophrenia may laugh inappropriately for no apparent reason, make illogical statements, or seem preoccupied with their own thoughts or perceptions. Their disorganized behavior may disrupt normal activities, such as showering, dressing, and preparing meals.
• Undifferentiated-type schizophrenia is characterized by some symptoms seen in all of the above types, but not enough of any one of them to define it as another particular type of schizophrenia.
• Residual-type schizophrenia is characterized by a past history of at least one episode of schizophrenia, but the person currently has no "positive" symptoms (such as delusions, hallucinations, disorganized speech, or behavior). It may represent a transition between a full-blown episode and complete remission, or it may continue for years without any further psychotic episodes.
Catatonic Schizophrenia
This type of schizophrenia includes extremes of behavior, including:
Catatonic excitement - overexcitement or hyperactivity, in which the patient may mimic sounds (echolalia) or movements (achopraxia) around them.
Catatonic stupor - a dramatic reduction in activity in which the patient cannot speak, move or respond. Virtually all movements stops.
Conclusion
It is clear now, through the use of genetic linkage studies and microbiology, that schizophrenia does indeed have a biological explanation. However, the biological explanation is only part of the story. A yet unknown combination of intense stress, sociocultural situations, and cognitive processes may lead to the actual onset of schizophrenia aided by natural precursors. The most compelling explanation seems to be that a genetically inherited biological abnormality gives rise to hallucinations/delusions as a result of intense stress and eventually leads to other negative symptoms in reaction to the hallucinations/ delusions. At any rate, the current understanding of schizophrenia explains that the symptoms, however easily identifiable, are the result of a complex interaction between nature and nurture that can be treated adequately through the use of atypical anti psychotic drugs and psychotherapy.
This ppt will provide a complete information on the topic Depression. It Will also provide the types of depression, pathophysiology involved, causes, drugs used in Depression and its management.
Schizophrenia is a serious mental illness that affects how a person thinks, f...AmitSherawat2
Schizophrenia is a serious mental illness that affects how a person thinks, feels, and behaves. People with schizophrenia may seem like they have lost touch with reality, which can be distressing for them and for their family a
Schizophrenia is a metal disorder characterized by disruptions in thought processes, perceptions, emotional responsiveness and social interaction. Here the etiology, epidemiology, types, signs and symptoms, pathophysiology, complications, diagnosis as well as management of schizophrenia is explained.
Antipsychotics, also known as neuroleptics,[1] are a class of psychotropic medication primarily used to manage psychosis (including delusions, hallucinations, paranoia or disordered thought), principally in schizophrenia but also in a range of other psychotic disorders.[2][3] They are also the mainstay together with mood stabilizers in the treatment of bipolar disorder.[4]
Antipsychotic
Drug class
Zyprexa.PNG
Olanzapine, an example of a second-generation (atypical) antipsychotic
Class identifiers
Synonyms
Neuroleptics, major tranquilizers[1]
Use
Principally: Schizophrenia, Schizoaffective disorder, Dementia, Tourette syndrome, Bipolar disorder, irritability in autism spectrum disorder
Clinical data
Drugs.com
Drug Classes
External links
MeSH
D014150
In Wikidata
Prior research has shown that use of any antipsychotic is associated with smaller brain tissue volumes,[5][6] including white matter reduction[7] and that this brain shrinkage is dose dependent and time dependent.[5][6] A more recent controlled trial suggests that second generation antipsychotics[8] combined with intensive psychosocial therapy[9] may potentially prevent pallidal brain volume loss in first episode psychosis.[10][7]
The use of antipsychotics may result in many unwanted side effects such as involuntary movement disorders, gynecomastia, impotence, weight gain and metabolic syndrome. Long-term use can produce adverse effects such as tardive dyskinesia, tardive dystonia, and tardive akathisia.
Prevention of these adverse effects is possible through concomitant medication strategies including use of beta-blockers. Currently, treatments for tardive diseases are not well established.
First-generation antipsychotics (e.g. chlorpromazine), known as typical antipsychotics, were first introduced in the 1950s, and others were developed until the early 1970s.[11] Second-generation antipsychotics, known as atypical antipsychotics, were introduced firstly with clozapine in the early 1970s followed by others (e.g. risperidone).[12] Both generations of medication block receptors in the brain for dopamine, but atypicals tend to act on serotonin receptors as well. Neuroleptic, originating from Greek: νεῦρον (neuron) and λαμβάνω (take hold of)—thus meaning "which takes the nerve"—refers to both common neurological effects and side
Schizophrenia is one of the most debilitating mental illness which demands immediate attention by the family. There are certain types of schizophrenia based on its symptom presentation and its management mostly depends sxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
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
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
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
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
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
MANAGEMENT OF ATRIOVENTRICULAR CONDUCTION BLOCK.pdfJim Jacob Roy
Cardiac conduction defects can occur due to various causes.
Atrioventricular conduction blocks ( AV blocks ) are classified into 3 types.
This document describes the acute management of AV block.
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
3. Schizophrenia is a chronic
heterogeneous syndrome of disorganized and
bizarre thoughts, delusions, hallucinations,
inappropriate affect, cognitive deficits, and
impaired psychosocial functioning
4. • It is a psychotic disorder marked by
severely impaired thinking, emotions and
behaviours. Schizophrenic patients are
unable to filter sensory stimuli and may
have enhanced perception of sounds,
colours and other features of their
environment.
• Most schizophrenics, if untreated can
gradually withdraw themselves from the
interactions with other people and lose their
ability to take care of personnel needs
5. TYPES OF SCHIZOPHRENIA
CATATONIC
Motor symptoms are most notable. The
patient may either demonstrate rigid
immobility or excessive purposeless
movement. The patient may be silent
and withdrawn or may become loud and
shout.
Bizarre voluntary movements such as
posturing may also occur.
The patient may fluctuate between the
two extremes.
DISORGANISED
The patient tends to have
disorganized speech and
behavior with a fl at affect.
Hallucinations
and delusions are not well
formed and fragmented. The
patient may also have bizarre
mannerisms and grimacing.
6. PARANOID
The most common type of
schizophrenia. Patients are
usually preoccupied with
paranoid delusions or auditory
hallucinations. Cognitive
function is usually preserved; if
thought disorder is present, it
does not prevent description of
delusions or hallucinations.
RESIDUAL
The patient does not have
acute psychosis, but some
symptoms of
schizophrenia remain.
Largely negative
symptoms are seen, such
as flat affect, social
withdrawal, and loose
associations. Prominent
delusions or hallucinations
are not present.
7. UNDIFFERENTIATED
The patient meets the criteria for a diagnosis
of schizophrenia but does not meet the
criteria for a specific type, or the patient may
meet the criteria for multiple types of
schizophrenia. No one type appears to be
dominant.
8. EPIDEMIOLOGY
Lifetime prevalence of schizophrenia ranges from 0.6% to
1.9%, with an average of approximately 1%.
The worldwide prevalence of schizophrenia is remarkably
similar among all cultures.
Schizophrenia most commonly has its onset in late
adolescence or early adulthood and rarely occurs before
adolescence or after the age of 40 years.
The prevalence of schizophrenia is equal in males and
females.
10. ETIOLOGY
• No one knows the exact causes of
Schizophrenia, but multiple possible
factors have been discovered.
• These factors include:
1. Genetics
2. Brain chemical imbalance
3. Environmental factors
4. Family history
11. PATHOPHYSIOLOGY
Genetic Theory:
• A strong genetic link exists for the development of
schizophrenia.
Occurs in 1% of general population, however this increases to
10% if a 1st degree relative has a history of schizophrenia.
Risk of developing schizophrenia further increases to 40%
when both parents have a history of schizophrenia.
Studies are going to locate specific genes to the development
of schizophrenia.
12. Dopamine Theory:
• The dopamine hyperactivity in the brain is responsible for
psychotic symptoms present in schizophrenia.
While dopamine hyperactivity is present in mesolimbic
pathway, other areas of the brain such as the prefrontal, frontal
and temporal cortices have decrease activity during acute
psychosis.
Other neurotransmitters thought to be involved in
schizophrenia include 5-HT, glutamate.
The role of glutamate is also being evaluated because one of its
major functions is to regulate dopamine activity. Glutamate
deficiency has been found to cause similar effects to that of
dopamine hyperactivity.
13. Neuro-developmental Theory:
• Schizophrenia occurs as a result of an in
Utero disturbance during pregnancy.
Potential causes of this disturbance include upper
respiratory infection, obstetric complication and
neonatal hypoxia.
14. Psychosocial Theories:
• These theories propose that situation such
as stress, poor interpersonal skills,
conflicting family, communication and
various socio-economic influences are
linked to development of schizophrenia.
15. Neurotransmitter Abnormalities
• Abnormalities in the dopaminergic system
– Hypo-dopaminergic activity in the mesocortical
system, leading to negative symptoms
– Hyper-dopaminergic activity in the mesolimbic
system, leading to positive symptoms
16.
17. • The Diagnostic and Statistical Manual of Mental Disorders,
specifies the following criteria for the diagnosis of
schizophrenia:
✓ Persistent dysfunction lasting longer than 6 months
✓ Two or more symptoms (present for at least 1 month),
including hallucinations, delusions, disorganized speech,
grossly disorganized or catatonic behavior, and negative
symptoms
✓ Significantly impaired functioning (work, interpersonal, or
self-care)
DIAGNOSIS
18. • Schizophrenic patients appear to have small brains with large
ventricular volumes, indicating a relative deficit of neurons.
• Structural and functional brain imaging studies have strongly
suggested that regions of the medial temporal lobe (e.g.,
hippocampus) have diminished numbers of neurons and also
have demonstrated the inability of individuals with
schizophrenia to activate the frontal cortex and successfully
execute tasks that require frontal cortical function.
IMAGING
Ventricular enlargement and cortical atrophy, as seen on CT scan, have
been correlated with chronic course, severe cognitive impairment, and non
responsiveness to neuroleptic medications.
Decreased frontal lobe activity seen on PET scan has been associated with
negative symptoms.
19.
20. TREATMENT
GOALS AND OBJECTIVES:
There is currently no known cure for schizophrenia.
Treatment options include psychotherapy as well as
pharmacotherapy.
The goals and objectives of treatment are as follows:
A. Minimize symptoms of schizophrenia
B. Improve quality of life and social/occupational functioning
C. Prevent relapse and hospitalization
D. Minimize adverse effects of medications
E. Prevent suicide attempts or self-harm
23. First generation or typical antipsychotics:
Chlorpromazine
Trifluperazine
Thioridazine
Perphanazine
Fluphenazine
Haloperidol
Loxapine
24. • Mechanism of Action:
The antipsychotic effect of these medications
is primarily mediated through the blockade of
dopamine type 2 (D2 receptors).
Adverse effects:
Sedation,
anticholinergic effects,
EPS
hyperprolactemia,
moderate weight gain
Photosensitivity
25. Second Generation or Atypical
Antipsychotics
Clonazapine
Risperidone
Olanzapine
Quetipine
Ziprasidone
26. • Mechanism of action:
Atypical antipsychotics are dopamine
antagonists but also block 5-HT2A-receptors
Adverse effects:
Sedation, anticholinergic effects
(Clonazapine, Olanzapine), EPS,
DM, hyperprolactemia
(Risperidone), hypercholestremia
27. References
1. Text book of Clinical Pharmacy and
Therapeutics
2. Text book of Pharmacology by RANG and
DALE’S.
3. Essentials of Medical Pharmacology by
K.D.Tripathi.