The brachial plexus is a network of nerves in the neck, axilla, and arm that originates from the cervical and thoracic spinal nerve roots. It provides motor and sensory innervation to the upper limb. Specifically, the brachial plexus forms from the ventral rami of cervical nerve roots C5-C8 and thoracic nerve root T1. These rami come together to form the roots, trunks, divisions, cords, and peripheral branches that make up the brachial plexus and allow it to innervate the muscles and skin of the arm.
Brachial plexus is one of the tough topic to remember by anyone undergoing MBBS course. This slide gives you in detail about the Origin / Course / Formation / Distribution / Anatomical variations & Applied anatomy & Made so easy to Remember & Draw as well.
Brachial plexus is one of the tough topic to remember by anyone undergoing MBBS course. This slide gives you in detail about the Origin / Course / Formation / Distribution / Anatomical variations & Applied anatomy & Made so easy to Remember & Draw as well.
gross Anatomy of Mid Brain.location an relation of midbrain. external an internal features of mid brain. cross section at the level of superior and inferior colliculus. Anterior and posterior view of midbrain.
clinical correlation of midbrain.
Neuroanatomy | 2. Cerebrum (1) Overview and Cerebral CortexAhmed Eljack
This is the second lecture in neuroanatomy presented and taught by Ahmed Eljack to second level medical students at Alneelain University.
This lecture discussed the divisions and landmarks of the cerebrum, important white matter bundles of the cerebrum and their functions, and the meninges.
4 th ventricle- Anatomical and surgical perspectivesuresh Bishokarma
4th ventricle connects the entire ventricular system of brain. Its connection with cisterns magna and cerebella pontine cistern via foramen of magenta and Luschka. CSF absorbs into the arachnoid granulation.
Atlanto occipital and atlanto axial jointShubham Singh
Anatomy:
>Atlas is the topmost vertebra and chief peculiarity of atlas is that it has no body, it is ring like and consist of anterior and posterior arch and two lateral masses.
>Axis, the 2nd cervical vertebra has a concave under side and convex from side to side. The most distinctive characteristic of this bone is strong odontoid process, the dens.
TheJoint:
>Atlanto-occipital joint (articulation between the atlas and the occipital bone) consists of a pair of condyloid joints.
>The atlanto-occipital joints are synovial socket-type joints
Ligaments:
> Posterior atlanto-occipital membrane: extend from anterior arch of atlas to posterior margin of foramen magnum.
>Anterior atlanto-occipital membrane: extend from anterior arch of atlas to anterior margin of foramen magnum.
>The ligamentam flavam join laminae of adjacent vertebral arches.
>The interspinous ligaments expand to form the ligamentum nuchae which inserts along the posterior foramen magnum and external occipital condyle.
> The following four ligaments stabilize these joints:
1.Apical ligament: Connects the dens to the foramen magnum of the occipital bone.
2.Alar ligaments: Connect the dens to the lateral margins of the foramen magnum.
3.Cruciate ligament: Attaches the dens to the anterior arch of the atlas and the body of the axis to the foramen magnum of the occipital bone.
4.Tectorial membrane: Starts at the skull and becomes the posterior longitudinal ligament.
>Atlanto-axial articular capsules are thick and loose, and connect the margins of the lateral masses of the atlas with those of the posterior articular surfaces of the axis.
Muscles:
>Flexion is produced mainly by the action of longis capitis, rectus capitis anterior and sternocleidomastoid (anterior fibres)
>Extension by the rectus capitis posterior major and minor, the obliquus capitis superior, the semispinalis capitis, splenius capitis, longissimus capitis, sternocleidomastoid and upper fibres of the trapezius
>The recti lateralis are concerned in the lateral movement, assisted by the trapezius, splenius capitis, semispinalis capitis, and the sternocleidomastoid of the same side, all acting together.
Movements:
>Flexion and extension in the Sagittal axis, which give rise to the ordinary forward and backward nodding of the head.
>Lateral flexion to one or other side in the Frontal axis(titling of head
>Lateral AAJ Movement: It is a synovial joint which allows only gliding
>Medial AAJ Movement: This joint allows the rotation of the atlas the axis i.e round the dens.
Clinical anatomy:
> Headaches can arise from many different sources including dysfunctional muscles, tears in the ligaments, misalignment of the vertebral bodies, injury to cervical facets and degenerative discs.
>Excessive flexion could rupture the supraspinous ligament.
>Posterior atlanto-occipital membrane ossification cause migraine headaches due to compression of artery.
This is the first lecture about the anatomy of the brainstem discussing the definition of the brainstem and the anatomical relations along with the external and internal parts (in general) and listing the major functions of brainstem. Then describing the medulla oblongata with its location, external and internal functions at different levels of sections. Lastly, this lectures discusses the most important clinical syndromes affecting the medulla oblongata.
gross Anatomy of Mid Brain.location an relation of midbrain. external an internal features of mid brain. cross section at the level of superior and inferior colliculus. Anterior and posterior view of midbrain.
clinical correlation of midbrain.
Neuroanatomy | 2. Cerebrum (1) Overview and Cerebral CortexAhmed Eljack
This is the second lecture in neuroanatomy presented and taught by Ahmed Eljack to second level medical students at Alneelain University.
This lecture discussed the divisions and landmarks of the cerebrum, important white matter bundles of the cerebrum and their functions, and the meninges.
4 th ventricle- Anatomical and surgical perspectivesuresh Bishokarma
4th ventricle connects the entire ventricular system of brain. Its connection with cisterns magna and cerebella pontine cistern via foramen of magenta and Luschka. CSF absorbs into the arachnoid granulation.
Atlanto occipital and atlanto axial jointShubham Singh
Anatomy:
>Atlas is the topmost vertebra and chief peculiarity of atlas is that it has no body, it is ring like and consist of anterior and posterior arch and two lateral masses.
>Axis, the 2nd cervical vertebra has a concave under side and convex from side to side. The most distinctive characteristic of this bone is strong odontoid process, the dens.
TheJoint:
>Atlanto-occipital joint (articulation between the atlas and the occipital bone) consists of a pair of condyloid joints.
>The atlanto-occipital joints are synovial socket-type joints
Ligaments:
> Posterior atlanto-occipital membrane: extend from anterior arch of atlas to posterior margin of foramen magnum.
>Anterior atlanto-occipital membrane: extend from anterior arch of atlas to anterior margin of foramen magnum.
>The ligamentam flavam join laminae of adjacent vertebral arches.
>The interspinous ligaments expand to form the ligamentum nuchae which inserts along the posterior foramen magnum and external occipital condyle.
> The following four ligaments stabilize these joints:
1.Apical ligament: Connects the dens to the foramen magnum of the occipital bone.
2.Alar ligaments: Connect the dens to the lateral margins of the foramen magnum.
3.Cruciate ligament: Attaches the dens to the anterior arch of the atlas and the body of the axis to the foramen magnum of the occipital bone.
4.Tectorial membrane: Starts at the skull and becomes the posterior longitudinal ligament.
>Atlanto-axial articular capsules are thick and loose, and connect the margins of the lateral masses of the atlas with those of the posterior articular surfaces of the axis.
Muscles:
>Flexion is produced mainly by the action of longis capitis, rectus capitis anterior and sternocleidomastoid (anterior fibres)
>Extension by the rectus capitis posterior major and minor, the obliquus capitis superior, the semispinalis capitis, splenius capitis, longissimus capitis, sternocleidomastoid and upper fibres of the trapezius
>The recti lateralis are concerned in the lateral movement, assisted by the trapezius, splenius capitis, semispinalis capitis, and the sternocleidomastoid of the same side, all acting together.
Movements:
>Flexion and extension in the Sagittal axis, which give rise to the ordinary forward and backward nodding of the head.
>Lateral flexion to one or other side in the Frontal axis(titling of head
>Lateral AAJ Movement: It is a synovial joint which allows only gliding
>Medial AAJ Movement: This joint allows the rotation of the atlas the axis i.e round the dens.
Clinical anatomy:
> Headaches can arise from many different sources including dysfunctional muscles, tears in the ligaments, misalignment of the vertebral bodies, injury to cervical facets and degenerative discs.
>Excessive flexion could rupture the supraspinous ligament.
>Posterior atlanto-occipital membrane ossification cause migraine headaches due to compression of artery.
This is the first lecture about the anatomy of the brainstem discussing the definition of the brainstem and the anatomical relations along with the external and internal parts (in general) and listing the major functions of brainstem. Then describing the medulla oblongata with its location, external and internal functions at different levels of sections. Lastly, this lectures discusses the most important clinical syndromes affecting the medulla oblongata.
brachial plexus, branches of brachial plexus, main nerves of brachial plexus and their innervations, disorders of brachial plexus injury, Erb's palsy, Klumpke's palsy, compression of brachial plexus
A medical educational presentation on Brachial plexus. In this presentation formation of plexus has been explained. Branches with their nerve root value is mentioned. brachial supply to upper limb muscles is briefly explained. clinical anatomy is explained in detail
Anomalous Innervations in (EMG/NCS) by MurtazaMurtaza Syed
Anomalous Innervation.
These are the sort of normal variants which can be found in any normal subject or can concomitantly be found or superimposed in pathological cases. Identifying these anomalies helps out interpreting and making correct diagnosis and to avoid any misinterpretation.
Late response are the most helpful findings in some of the diseases affecting the peripheral nerves, (e.g GBS, Radiculopathies, ). How to assess these responses while performing Nerve Conduction Studies, is the most technical and theoretical consideration.... Here we go with the same things in the stated slides
what is RNS and what the techniques to perform this test in the lab. Its significance in the evaluation and diagnosis of NMJ disorders like MG, LEMBS etc..
EEG variants, are always to be recognized while interpreting the EEG one must be aware of these. Major and most common EEG is variants are discussed in the stated presentation.
Syed Irshad Murtaza.
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
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.
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.
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.
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
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
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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!
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.
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
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
2. What is the Brachial Plexus?
• Introduction
• A network of spinal nerves that originates in the
back of the neck, extends through the axilla
(armpit) and gives rise to nerves to the upper
limb.
• The brachial plexus is a network of nerve fibers,
running from the spine, formed by the ventral
(Anterior) rami of the lower four cervical and first
thoracic nerve roots (C5-C8, T1).
3.
4.
5. Anatomy
• Brachial Plexus proceeds through the neck,
the axilla (armpit region), and into the arm. It
is a network of nerves passing through the
cervico-axillary canal to reach axilla and
innervates brachium (upper arm),
antebrachium (forearm) and hand.
6.
7. Horns in the spinal Cord
• In the spinal cord the gray matter is present inside
and white matter I towards outside while in the
brain this distribution is vice versa.
• On cross section of the spinal cord gray matter in
spinal cord presents butterfly like structure from
which some projections like “Horns” are seen,
termed as
• Ventral/Anterior Horn (ventral/anterior/motor
root centre (Efferent Nerve)
• Lateral Horn (Preganglionic sympathetic neurons,
• Dorsal/posterior Horn (dorsal/posterior/sensory
root centre (Afferent Nerve)
8.
9. Terms to define
• Ganglion: collection of the nerve cell bodies is called
ganglion. E.g Dorsal root ganglion (DRG)
• Ramu (Pl: Rami) Spinal nerve when exits from the
vertebrae , it divides into two branches termed as,
• 1. ventral/anterior primary ramus
• 2. dorsal/posterior primary ramus
• Ventral/anterior ramus: it is the ventral division of
spinal nerve outside the vertebrae, which supplies
to the skin, muscles on anterior body.
• Dorsal division supplies to the skin and muscles of
the back.
10. RTDCB
• Brachial plexus comprises of Root, Trunk,
Division, Cord and peripheral Branches.
• A mnemonic for remember the region of the
brachial plexus is:
• Real - Roots
• Teenagers - Trunks
• Drink - Divisions
• Cold - Cords
• Beer – Branches
12. Anatomy of RTDCB
• Roots: (lying between the anterior and middle
scalene muscles),
• Trunks: (found in the posterior triangle of the
neck),
• Divisions: (lay posterior/behind the clavicle),
Cords: (found in axilla & named according to
their relationship with axillary/brachial artery ) &
• Branches: (the five main nerve fibers in the arm).
13.
14. Formation of Roots & Trunk of the Brachial Plexus
The roots of the brachial plexus come from
branches of the spinal vertebrae C5-8 and T1.
The cervical roots, C5 and C6, fuse together to
form the Upper (Superior) trunk
The cervical root C7 goes on to become
the Middle trunk
The cervical roots, C8 and T1, fuse together to
form the Lower (Inferior) trunk
15. The Trunks & Divisions of the Brachial Plexus
• There are three trunks of the brachial plexus that
lie in the posterior neck triangle.
• Each of the Trunks has its two divisions
• Anterior Division
• Posterior Division
• (Anterior divisions of the upper, middle, and
lower trunks
• Posterior divisions of the upper, middle, and
lower trunks)
• These six Divisions further unite to form the
Cords.
16. The Divisions & Cords of the Brachial Plexus
• There are two divisions of the brachial plexus that
lie posterior to the clavicle. These divisions go on
to form the cords of the brachial plexus.
• Anterior divisions of Upper and Middle Trunks go
on to form the Lateral cord
• All Posterior divisions go on to form
the Posterior cord
• The Anterior division of the Lower Trunk goes on
to form the Medial Cord
17. The Cords and main Terminal (Peripheral) branches
of Brachial Plexus
• The cords of the brachial plexus divide and join
together to form the five main nerve branches of
the arm.
• The Lateral cord divides to become
the Musculocutaneous and Median Nerve
Branches.
• The Medial cord divides to become the Median and
Ulnar Nerve Branches
• The Posterior cord divides to become the Radial
and Axillary Nerve Branches
18. Branches from direct roots
• Dorsal scapular nerve-(c4-c5)- (levator
scapulae, rhomboids)
• Subclavian nerve(c5-c6)- (subclavian muscle
• Long thoracic nerve(c5-c7)- serratus anterior
muscle
• Branch from trunk
• Supra scapular nerve(c5-c6)- branch from
upper trunk.
• Supplies infra/supraspinatus
19. Branches and their Roots
• There are five "terminal" branches and numerous other "pre-terminal"
or "collateral" branches that leave the plexus at various
points along its length.
• Lateral cord-1) musculocutaneous nerve(c5-c7)
2) lateral head of median nerve(c5-c7)
• Medial cord-1) med.ant.thoracic nerve(c8-T1)
2) med. Cut. Nerve of arm(c8-T1)
3) med.cut. Nerve of forearm(c8-T1)
4) ulnar nerve(c7-T1)
5) med. Head of median nerve(c8-T1)
• Posterior cord-
1) subscapular nerve(upper, lower)(c5-c7)
2) thoraco dorsal nerve(c5-c7)
3) axillary nerve(c5-c6)
4) radial nerve(c5-c8)