The document summarizes the ascending and descending spinal tracts. There are ascending tracts that conduct sensory information from the body to the brain, including the lateral and anterior spinothalamic tracts for pain and temperature, and the posterior white columns for proprioception. There are also descending tracts that convey motor commands from the brain to the spinal cord to control skeletal muscles, such as the lateral and anterior corticospinal tracts. In addition, there are tracts connecting the spinal cord and cerebellum that are important for motor coordination.
Ascending tracts
They are located in the white matter
Conduct afferent information (May or may not reach consciousness)
There are 2 types of information
Exteroceptive : Originates from outside the body (Pain, temperature & touch)
Proprioceptive : Originates from inside the body (From muscles & joints)
Normally there are 3 neurons in an ascending pathway
1st order neuron : Cell body is in the posterior root ganglion
2nd order neuron : Decussates (Crosses to the opposite side) & ascends to a higher level of the CNS
3rd neuron : Located in the thalamus & passes to a sensory region of the cortex
Ascending tracts
They are located in the white matter
Conduct afferent information (May or may not reach consciousness)
There are 2 types of information
Exteroceptive : Originates from outside the body (Pain, temperature & touch)
Proprioceptive : Originates from inside the body (From muscles & joints)
Normally there are 3 neurons in an ascending pathway
1st order neuron : Cell body is in the posterior root ganglion
2nd order neuron : Decussates (Crosses to the opposite side) & ascends to a higher level of the CNS
3rd neuron : Located in the thalamus & passes to a sensory region of the cortex
spinal cord, ascending tracts of the the spinal cord, spinocortical tracts, gray matter of spinal cord, white mater of spinal cord, organization of neuron, first order second order and third order neuron, anterolateral spinal tract anteroposterior spinal tract, spinolivary tract, visceral sensory tract, dorsal column tract, spino cerebellar tract , spinorectal pathway, spino olivary pathway, cerebellar peduncles,
Functions and ascending tract of spinal cordFatima Mangrio
As the name suggests, the ascending tracts of the spinal cord ascend from the spinal cord and connect it to the brain. These tracts are named based on their origin and termination. They are found running along the dorsal, lateral, and ventral columns of the white matter.
spinal cord, ascending tracts of the the spinal cord, spinocortical tracts, gray matter of spinal cord, white mater of spinal cord, organization of neuron, first order second order and third order neuron, anterolateral spinal tract anteroposterior spinal tract, spinolivary tract, visceral sensory tract, dorsal column tract, spino cerebellar tract , spinorectal pathway, spino olivary pathway, cerebellar peduncles,
Functions and ascending tract of spinal cordFatima Mangrio
As the name suggests, the ascending tracts of the spinal cord ascend from the spinal cord and connect it to the brain. These tracts are named based on their origin and termination. They are found running along the dorsal, lateral, and ventral columns of the white matter.
an overview of the ascending tract of the spinal cord....an anatomical approach to understand the somato-sensory pathway.
Prepared as a class presentation .
Health Education on prevention of hypertensionRadhika kulvi
Hypertension is a chronic condition of concern due to its role in the causation of coronary heart diseases. Hypertension is a worldwide epidemic and important risk factor for coronary artery disease, stroke and renal diseases. Blood pressure is the force exerted by the blood against the walls of the blood vessels and is sufficient to maintain tissue perfusion during activity and rest. Hypertension is sustained elevation of BP. In adults, HTN exists when systolic blood pressure is equal to or greater than 140mmHg or diastolic BP is equal to or greater than 90mmHg. The
Deep Leg Vein Thrombosis (DVT): Meaning, Causes, Symptoms, Treatment, and Mor...The Lifesciences Magazine
Deep Leg Vein Thrombosis occurs when a blood clot forms in one or more of the deep veins in the legs. These clots can impede blood flow, leading to severe complications.
Global launch of the Healthy Ageing and Prevention Index 2nd wave – alongside...ILC- UK
The Healthy Ageing and Prevention Index is an online tool created by ILC that ranks countries on six metrics including, life span, health span, work span, income, environmental performance, and happiness. The Index helps us understand how well countries have adapted to longevity and inform decision makers on what must be done to maximise the economic benefits that comes with living well for longer.
Alongside the 77th World Health Assembly in Geneva on 28 May 2024, we launched the second version of our Index, allowing us to track progress and give new insights into what needs to be done to keep populations healthier for longer.
The speakers included:
Professor Orazio Schillaci, Minister of Health, Italy
Dr Hans Groth, Chairman of the Board, World Demographic & Ageing Forum
Professor Ilona Kickbusch, Founder and Chair, Global Health Centre, Geneva Graduate Institute and co-chair, World Health Summit Council
Dr Natasha Azzopardi Muscat, Director, Country Health Policies and Systems Division, World Health Organisation EURO
Dr Marta Lomazzi, Executive Manager, World Federation of Public Health Associations
Dr Shyam Bishen, Head, Centre for Health and Healthcare and Member of the Executive Committee, World Economic Forum
Dr Karin Tegmark Wisell, Director General, Public Health Agency of Sweden
Antibiotic Stewardship by Anushri Srivastava.pptxAnushriSrivastav
Stewardship is the act of taking good care of something.
Antimicrobial stewardship is a coordinated program that promotes the appropriate use of antimicrobials (including antibiotics), improves patient outcomes, reduces microbial resistance, and decreases the spread of infections caused by multidrug-resistant organisms.
WHO launched the Global Antimicrobial Resistance and Use Surveillance System (GLASS) in 2015 to fill knowledge gaps and inform strategies at all levels.
ACCORDING TO apic.org,
Antimicrobial stewardship is a coordinated program that promotes the appropriate use of antimicrobials (including antibiotics), improves patient outcomes, reduces microbial resistance, and decreases the spread of infections caused by multidrug-resistant organisms.
ACCORDING TO pewtrusts.org,
Antibiotic stewardship refers to efforts in doctors’ offices, hospitals, long term care facilities, and other health care settings to ensure that antibiotics are used only when necessary and appropriate
According to WHO,
Antimicrobial stewardship is a systematic approach to educate and support health care professionals to follow evidence-based guidelines for prescribing and administering antimicrobials
In 1996, John McGowan and Dale Gerding first applied the term antimicrobial stewardship, where they suggested a causal association between antimicrobial agent use and resistance. They also focused on the urgency of large-scale controlled trials of antimicrobial-use regulation employing sophisticated epidemiologic methods, molecular typing, and precise resistance mechanism analysis.
Antimicrobial Stewardship(AMS) refers to the optimal selection, dosing, and duration of antimicrobial treatment resulting in the best clinical outcome with minimal side effects to the patients and minimal impact on subsequent resistance.
According to the 2019 report, in the US, more than 2.8 million antibiotic-resistant infections occur each year, and more than 35000 people die. In addition to this, it also mentioned that 223,900 cases of Clostridoides difficile occurred in 2017, of which 12800 people died. The report did not include viruses or parasites
VISION
Being proactive
Supporting optimal animal and human health
Exploring ways to reduce overall use of antimicrobials
Using the drugs that prevent and treat disease by killing microscopic organisms in a responsible way
GOAL
to prevent the generation and spread of antimicrobial resistance (AMR). Doing so will preserve the effectiveness of these drugs in animals and humans for years to come.
being to preserve human and animal health and the effectiveness of antimicrobial medications.
to implement a multidisciplinary approach in assembling a stewardship team to include an infectious disease physician, a clinical pharmacist with infectious diseases training, infection preventionist, and a close collaboration with the staff in the clinical microbiology laboratory
to prevent antimicrobial overuse, misuse and abuse.
to minimize the developme
CHAPTER 1 SEMESTER V PREVENTIVE-PEDIATRICS.pdfSachin Sharma
This content provides an overview of preventive pediatrics. It defines preventive pediatrics as preventing disease and promoting children's physical, mental, and social well-being to achieve positive health. It discusses antenatal, postnatal, and social preventive pediatrics. It also covers various child health programs like immunization, breastfeeding, ICDS, and the roles of organizations like WHO, UNICEF, and nurses in preventive pediatrics.
CRISPR-Cas9, a revolutionary gene-editing tool, holds immense potential to reshape medicine, agriculture, and our understanding of life. But like any powerful tool, it comes with ethical considerations.
Unveiling CRISPR: This naturally occurring bacterial defense system (crRNA & Cas9 protein) fights viruses. Scientists repurposed it for precise gene editing (correction, deletion, insertion) by targeting specific DNA sequences.
The Promise: CRISPR offers exciting possibilities:
Gene Therapy: Correcting genetic diseases like cystic fibrosis.
Agriculture: Engineering crops resistant to pests and harsh environments.
Research: Studying gene function to unlock new knowledge.
The Peril: Ethical concerns demand attention:
Off-target Effects: Unintended DNA edits can have unforeseen consequences.
Eugenics: Misusing CRISPR for designer babies raises social and ethical questions.
Equity: High costs could limit access to this potentially life-saving technology.
The Path Forward: Responsible development is crucial:
International Collaboration: Clear guidelines are needed for research and human trials.
Public Education: Open discussions ensure informed decisions about CRISPR.
Prioritize Safety and Ethics: Safety and ethical principles must be paramount.
CRISPR offers a powerful tool for a better future, but responsible development and addressing ethical concerns are essential. By prioritizing safety, fostering open dialogue, and ensuring equitable access, we can harness CRISPR's power for the benefit of all. (2998 characters)
How many patients does case series should have In comparison to case reports.pdfpubrica101
Pubrica’s team of researchers and writers create scientific and medical research articles, which may be important resources for authors and practitioners. Pubrica medical writers assist you in creating and revising the introduction by alerting the reader to gaps in the chosen study subject. Our professionals understand the order in which the hypothesis topic is followed by the broad subject, the issue, and the backdrop.
https://pubrica.com/academy/case-study-or-series/how-many-patients-does-case-series-should-have-in-comparison-to-case-reports/
One of the most developed cities of India, the city of Chennai is the capital of Tamilnadu and many people from different parts of India come here to earn their bread and butter. Being a metropolitan, the city is filled with towering building and beaches but the sad part as with almost every Indian city
R3 Stem Cells and Kidney Repair A New Horizon in Nephrology.pptxR3 Stem Cell
R3 Stem Cells and Kidney Repair: A New Horizon in Nephrology" explores groundbreaking advancements in the use of R3 stem cells for kidney disease treatment. This insightful piece delves into the potential of these cells to regenerate damaged kidney tissue, offering new hope for patients and reshaping the future of nephrology.
Explore our infographic on 'Essential Metrics for Palliative Care Management' which highlights key performance indicators crucial for enhancing the quality and efficiency of palliative care services.
This visual guide breaks down important metrics across four categories: Patient-Centered Metrics, Care Efficiency Metrics, Quality of Life Metrics, and Staff Metrics. Each section is designed to help healthcare professionals monitor and improve care delivery for patients facing serious illnesses. Understand how to implement these metrics in your palliative care practices for better outcomes and higher satisfaction levels.
Navigating Challenges: Mental Health, Legislation, and the Prison System in B...Guillermo Rivera
This conference will delve into the intricate intersections between mental health, legal frameworks, and the prison system in Bolivia. It aims to provide a comprehensive overview of the current challenges faced by mental health professionals working within the legislative and correctional landscapes. Topics of discussion will include the prevalence and impact of mental health issues among the incarcerated population, the effectiveness of existing mental health policies and legislation, and potential reforms to enhance the mental health support system within prisons.
Defecation
Normal defecation begins with movement in the left colon, moving stool toward the anus. When stool reaches the rectum, the distention causes relaxation of the internal sphincter and an awareness of the need to defecate. At the time of defecation, the external sphincter relaxes, and abdominal muscles contract, increasing intrarectal pressure and forcing the stool out
The Valsalva maneuver exerts pressure to expel faeces through a voluntary contraction of the abdominal muscles while maintaining forced expiration against a closed airway. Patients with cardiovascular disease, glaucoma, increased intracranial pressure, or a new surgical wound are at greater risk for cardiac dysrhythmias and elevated blood pressure with the Valsalva maneuver and need to avoid straining to pass the stool.
Normal defecation is painless, resulting in passage of soft, formed stool
CONSTIPATION
Constipation is a symptom, not a disease. Improper diet, reduced fluid intake, lack of exercise, and certain medications can cause constipation. For example, patients receiving opiates for pain after surgery often require a stool softener or laxative to prevent constipation. The signs of constipation include infrequent bowel movements (less than every 3 days), difficulty passing stools, excessive straining, inability to defecate at will, and hard feaces
IMPACTION
Fecal impaction results from unrelieved constipation. It is a collection of hardened feces wedged in the rectum that a person cannot expel. In cases of severe impaction the mass extends up into the sigmoid colon.
DIARRHEA
Diarrhea is an increase in the number of stools and the passage of liquid, unformed feces. It is associated with disorders affecting digestion, absorption, and secretion in the GI tract. Intestinal contents pass through the small and large intestine too quickly to allow for the usual absorption of fluid and nutrients. Irritation within the colon results in increased mucus secretion. As a result, feces become watery, and the patient is unable to control the urge to defecate. Normally an anal bag is safe and effective in long-term treatment of patients with fecal incontinence at home, in hospice, or in the hospital. Fecal incontinence is expensive and a potentially dangerous condition in terms of contamination and risk of skin ulceration
HEMORRHOIDS
Hemorrhoids are dilated, engorged veins in the lining of the rectum. They are either external or internal.
FLATULENCE
As gas accumulates in the lumen of the intestines, the bowel wall stretches and distends (flatulence). It is a common cause of abdominal fullness, pain, and cramping. Normally intestinal gas escapes through the mouth (belching) or the anus (passing of flatus)
FECAL INCONTINENCE
Fecal incontinence is the inability to control passage of feces and gas from the anus. Incontinence harms a patient’s body image
PREPARATION AND GIVING OF LAXATIVESACCORDING TO POTTER AND PERRY,
An enema is the instillation of a solution into the rectum and sig
India Clinical Trials Market: Industry Size and Growth Trends [2030] Analyzed...Kumar Satyam
According to TechSci Research report, "India Clinical Trials Market- By Region, Competition, Forecast & Opportunities, 2030F," the India Clinical Trials Market was valued at USD 2.05 billion in 2024 and is projected to grow at a compound annual growth rate (CAGR) of 8.64% through 2030. The market is driven by a variety of factors, making India an attractive destination for pharmaceutical companies and researchers. India's vast and diverse patient population, cost-effective operational environment, and a large pool of skilled medical professionals contribute significantly to the market's growth. Additionally, increasing government support in streamlining regulations and the growing prevalence of lifestyle diseases further propel the clinical trials market.
Growing Prevalence of Lifestyle Diseases
The rising incidence of lifestyle diseases such as diabetes, cardiovascular diseases, and cancer is a major trend driving the clinical trials market in India. These conditions necessitate the development and testing of new treatment methods, creating a robust demand for clinical trials. The increasing burden of these diseases highlights the need for innovative therapies and underscores the importance of India as a key player in global clinical research.
2. Tracts serve as neuronal pathway
to join spinal cord and brain.
Nerve fibers of different sizes and
functions are sorted out and
segregated into nerve bundles or
tracts in white matter.
These are
a. Ascending tract
b. Descending tract
c. Intersegmental tracts
3. Ascending tracts of spinal cord
Conduct afferent information
i. Exteroceptive information:
Originates outside body- pain , temperature, touch
ii. Proprioceptive information
Originates inside body – from muscles and joints
4. First-order neuron
Has its cell body in the posterior root ganglion of the
spinal nerve
Peripheral process connects with a sensory receptor
ending
Central process enters spinal cord through posterior
root to synapse on second-order neuron.
Second-order neuron
Gives rise to an axon that decussates (crosses to
opposite side) & ascends to higher level of CNS where
it synapses with third-order neuron.
Third-order neuron
Usually in thalamus & gives rise to a projection fiber
that passes to a sensory region of cerebral cortex
5. Lateral Spinothalamic tract
Pain & temperature impulses travel to spinal cord in fast-conducting delta A-type fibers &
slow-conducting C-type fibers.
Axons entering spinal cord from posterior root ganglion proceed to tip of posterior gray
column & divide into ascending & descending branches, travel for a distance of one or two
segments of spinal cord & form posterolateral tract of Lissauer.
Terminate by synapsing with cells in posterior gray column.
Axons of second-order neurons cross to opposite side in anterior gray & white commissures
within one spinal segment of the cord, ascending in contralateral white column.
6. As the tract ascends through spinal cord, new fibers are added to
anteromedial aspect of tract.
In upper cervical segments of the cord, sacral fibers are lateral
and cervical segments are medial.
Fibers carrying pain are situated slightly anterior to those
conducting temperature.
As the lateral spinothalamic tract ascends through medulla
oblongata, accompanied by anterior spinothalamic tract &
spinotectal tract: spinal lemniscus.
7. It further ascends through posterior part of pons, midbrain &
tract end by synapsing with third-order neuron in ventral
posterolateral nucleus of thalamus.
Further it course through posterior limb of internal capsule &
corona radiata to reach somesthetic area in postcentral gyrus
of cerebral cortex.
8. Contralateral half of body is represented as
inverted, with the hand and mouth situated
inferiorly
leg situated superiorly
foot and anogenital region on medial surface
of hemisphere.
Sensory Homonculus.
Then transmitted to other regions of
cerebral cortex to be used by motor areas
and parietal association area.
Role of cerebral cortex is interpreting
quality of sensory information at level of
consciousness.
9.
10. Anterior spinothalamic tract
The axons enter spinal cord from posterior root ganglion &
proceed to tip of posterior gray column.
Second-order neuron now cross very obliquely to opposite side
in anterior gray & white commissures within several spinal
segments & ascend in opposite anterolateral white column as
anterior spinothalamic tract.
New fibers are added to medial aspect.
Upper cervical segments of the cord, the sacral fibers are
mostly lateral & the cervical segments are mostly medial.
11. In medulla oblongata, it accompanies the lateral spinothalamic
tract and the spinotectal tract, forming spinal lemniscus.
ascend through posterior part of pons, and the tegmentum of
the midbrain and terminate by synapsing with third-order
neuron in ventral posterolateral nucleus of thalamus.
posterior limb of the internal capsule and corona radiata
somesthetic area in postcentral gyrus of cerebral cortex
12.
13. Posterior White Column: Fasciculus Gracilis & Fasciculus
Cuneatus
Axons enter spinal cord from posterior root ganglion & pass directly to posterior white column of same side.
Long ascending fiber-synapse with cells in posterior gray horn, with internuncial neurons, & with anterior horn cells
as fasciculus gracilis & fasciculus cuneatus.
Short descending fiber are involved with intersegmental reflexes.
Fasciculus gracilis:
throughout length of spinal cord ;
fibers from the sacral, lumbar & lower six thoracic spinal nerves
Fasciculus cuneatus:
situated laterally in the upper thoracic & cervical segments
fibers from the upper six thoracic & all the cervical spinal nerves
14. Ascend ipsilaterally and terminate by synapsing on second-order
neurons in nuclei gracilis and cuneatus of medulla oblongata.
The axons of second-order neurons, called internal arcuate fibers,
cross median plane, decussating with corresponding fibers of
opposite side in sensory decussation.
then ascend as a single compact bundle, medial lemniscus,
through medulla oblongata, pons and midbrain ventral
posterolateral nucleus of thalamus.
15. Then it traverse via posterior limb of internal capsule &
corona radiata to reach somesthetic area in postcentral gyrus
of cerebral cortex.
Function:
- fine touch, exact localization & two-point discrimination
- Vibratory sense & the position of the different parts of the
body
16.
17. Posterior Spinocerebellar tract
First order neuron:- Traverse from posterior root ganglion and enter posterior gray column;
Synapse to nucleus dorsalis (Clarke's column).
Second order Neuron :-Ascends through posterolateral part of the lateral white column on the same side
of medulla
Here it joins inferior cerebellar peduncle & terminates in cerebellar cortex.
Function:
- receive muscle joint information from the muscle spindles, tendon organs, and joint receptors of the
trunk & lower limbs.
- coordination of limb movements & the maintenance of posture
18. Anterior Spinocerebellar Tract
Enters through posterior root, synapse to second-order neurons in
nucleus dorsalis at base of posterior gray column.
Majority cross to opposite side and ascend as in contralateral white
column; minority of axons ascend as anterior spinocerebellar tract
in lateral white column of same side.
Then it enters the cerebellum through cerebellar peduncle to synapse
into cerebellar nucelus.
Function:
- information from muscle spindles, tendon organs, and joint
receptors of trunk and upper and lower limbs
19. Other ascending tracts
Cuneocerebellar:
- Nucleus cuneatus to cerebellum,
- Conveys information of muscle joint sense to the cerebellum
Spinotectal:
- To superior colliculus of midbrain
- afferent information for spinovisual reflexes & brings about movements
of eyes head toward source of stimulation
Spinoreticular:
- reticular formation in medulla oblongata, pons, & midbrain
- influencing levels of consciousness
Spino olivary: conveys information to the cerebellum from cutaneous &
proprioceptive organs
20. Descending tracts
First-order neuron:
- has its cell body in cerebral cortex.
- descends to synapse on second-order neuron,
Second order neuron: an internuncial neuron,
situated in anterior gray column of spinal cord.
Third-order neuron:
- lower motor neuron, in the anterior gray column
- innervates the skeletal muscle through the
anterior root & spinal nerve.
In some instances, the axon of the first-order neuron
terminates directly on the thirdorder neuron (as in
reflex arcs).
Control of skeletal muscle activity
21.
22. At junction of medulla oblongata & spinal cord, most of fibers cross midline at
decussation of pyramids and enter lateral white column of spinal cord to form lateral
corticospinal tract.
Remaining fibers do not cross in decussation but descend in anterior white column of
spinal cord as anterior corticospinal tract; cross midline and terminate in anterior gray
column of spinal cord segments in cervical & upper thoracic regions.
Lateral corticospinal tract descends length of spinal cord; terminate in anterior gray
column of all spinal cord segments.
synapse with internuncial neurons, which, in turn, synapse with alpha motor neurons &
some gamma motor neurons.
23.
24.
25.
26.
27. Descending Autonomic Fibers
The higher centers of CNS associated with control of
autonomic activity are situated in cerebral cortex,
hypothalamus, amygdaloid complex, & reticular formation.
Although distinct tracts have not been recognized,
investigation of spinal cord lesions has demonstrated that
descending autonomic tracts do exist & probably form part of
reticulospinal tract.