NationMaster - Encyclopedia: Median nerve

The median nerve is a nerve that runs down the arm and forearm. It is one of the five main nerves originating from the brachial plexus. Image File history File links Download high resolution version (524x1000, 162 KB) File links The following pages link to this file: Ulnar nerve Long thoracic nerve Wikipedia:Grays Anatomy images with missing articles 17 Musculocutaneous nerve List of images in Grays Anatomy: IX. Neurology ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body (or Grays Anatomy as it has more commonly become known) is an anatomy textbook widely regarded as a classic work on human anatomy. ... In humans, the upper limb is an anatomical term for the limb that is attached to the pectoral girdle. ... For other uses, see Latin (disambiguation). ... The anterior compartment of the forearm contains the following muscles: E/I refers to extrinsic or intrinsic. Compartment syndrome Muscles of upper limbs VERTEBRAL COLUMN: trapezius - latissimus dorsi - rhomboid major - rhomboid minor - levator scapulae ANTERIOR AND LATERAL THORACIC WALLS: pectoralis major - pectoralis minor - subclavius - serratus anterior SHOULDER: deltoid - rotator cuff... The thenar eminence is the body of muscle on the palm of the human hand just beneath the thumb. ... Lumbrical can refer to: Lumbrical muscle (hand) Lumbrical muscle (foot) Category: ... The Lateral cord is a division of the brachial plexus. ... The Medial cord is a division of the brachial plexus. ... Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... Elseviers logo. ... Nerves (yellow) Nerves redirects here. ... Look up ARM in Wiktionary, the free dictionary. ... // The Human Forearm The forearm is the structure on the upper limb, between the elbow and the wrist. ... The brachial plexus is an arrangement of nerve fibres (a plexus) running from the spine (vertebrae C5-T1), through the neck, the axilla (armpit region), and into the arm. ...

The median nerve is formed from parts of the medial and lateral cords of the brachial plexus, and continues down the arm to enter the forearm with the brachial artery. The brachial plexus is an arrangement of nerve fibres (a plexus) running from the spine (vertebrae C5-T1), through the neck, the axilla (armpit region), and into the arm. ... The brachial artery is the major blood vessel of the upper arm. ...

The median nerve is the only nerve that passes through the carpal tunnel, where it may be compressed to cause carpal tunnel syndrome. This article is about the connective tissue. ... This article is about the medical condition. ...

Course

Course in the Upper Arm

After receiving inputs from both the lateral and medial cords of the brachial plexus, the median nerve courses with brachial artery on medial side of arm between biceps brachii and brachialis. At first lateral to the artery, it then crosses anteriorly to run medial to the artery in the distal arm and into the cubital fossa. A person flexing his biceps brachii In human anatomy, the biceps brachii is a muscle on the upper arm that acts to flex the elbow. ... Brachialis is a flexor muscle in the upper arm. ...

Course and Branches in the forearm

The median nerves arises from the cubital fossa and passes between the two heads of pronator teres. It then travels between flexor digitorum superficialis and flexor digitorum profundus before emerging between flexor digitorum superficialis and flexor carpi radialis. The Pronator teres muscle is a muscle of the human body, in the forearm. ... Flexor digitorum superficialis is an extrinsic flexor muscle of the fingers. ... The flexor digitorum profundis is a muscle in the forearm that flexes the fingers. ... Flexor digitorum superficialis is an extrinsic flexor muscle of the fingers. ... In anatomy, flexor carpi radialis is a muscle of the human forearm that acts to flex and abduct the hand. ...

The unbranched portion of the median nerve (which arises from the cubital fossa) innervates muscles of superficial and intermediate groups of the anterior compartment except flexor carpi ulnaris

The palmar cutaneous branch of the median nerve, which supplies the lateral aspect of the palmar skin arises proximal to the flexor retinaculum and passes superficial to it so does not pass through the carpal tunnel. The anterior interosseous nerve (volar interosseous nerve) is a branch of the median nerve that supplies the deep muscles on the front of the forearm, except the ulnar half of the flexor digitorum profundus. ... The anterior interosseous artery (volar interosseous artery), passes down the forearm on the volar surface of the interosseous membrane. ... The anterior compartment of the forearm contains the following muscles: E/I refers to extrinsic or intrinsic. Compartment syndrome Muscles of upper limbs VERTEBRAL COLUMN: trapezius - latissimus dorsi - rhomboid major - rhomboid minor - levator scapulae ANTERIOR AND LATERAL THORACIC WALLS: pectoralis major - pectoralis minor - subclavius - serratus anterior SHOULDER: deltoid - rotator cuff... Pronator quadratus is a square shaped muscle on the distal forearm that acts to pronate (turn so the palm faces downwards) the hand. ... The palmar branch of the median nerve arises at the lower part of the forearm. ...

Branches in the hand

The median nerve enters the hand through the carpal tunnel, deep to the flexor retinaculum along with the tendons of flexor digitorum superficialis, flexor digitorum profundus, and flexor pollicis longus. A tendon (or sinew) is a tough band of fibrous connective tissue that connects muscle to bone and is built to withstand tension. ... Flexor digitorum superficialis is an extrinsic flexor muscle of the fingers. ... The flexor digitorum profundis is a muscle in the forearm that flexes the fingers. ... The Flexor pollicis longus muscle is a muscle of the human body. ...

The median nerve supplies motor innervation to the first and second lumbricals. In the palm of the hand the median nerve is covered by the skin and the palmar aponeurosis, and rests on the tendons of the Flexor muscles. ... In the palm of the hand the median nerve is covered by the skin and the palmar aponeurosis, and rests on the tendons of the Flexor muscles. ...

Innervation

Upper Arm

Forearm

It innervates most of the flexors in the forearm except flexor carpi ulnaris and the medial two digits of flexor digitorum profundus, which are supplied by the ulnar nerve. The anterior compartment of the forearm contains the following muscles: E/I refers to extrinsic or intrinsic. The muscles are largely involved with flexion and pronation. ... In anatomy, flexor carpi ulnaris muscle is a muscle of the human forearm that acts to flex and adduct the hand. ... The flexor digitorum profundis is a muscle in the forearm that flexes the fingers. ... In human anatomy, the ulnar nerve is a nerve which runs from the shoulder to the hand, at one part running near the ulna bone. ...

Intermediate Group: The Pronator teres muscle is a muscle of the human body, in the forearm. ... In anatomy, flexor carpi radialis is a muscle of the human forearm that acts to flex and abduct the hand. ... OriginMedial epicondyle of humerus InsertionDistal half of the flexor retinaculum and palmar aponeurosis Innervation Median nerve(C7 and C8) Action Flexes hand(at wrist)and tightens palmar aponeurosis. ...

The anterior interosseus branch supplies the following muscles... Flexor digitorum superficialis is an extrinsic flexor muscle of the fingers. ...

The flexor digitorum profundis is a muscle in the forearm that flexes the fingers. ... The Flexor pollicis longus muscle is a muscle of the human body. ... Pronator quadratus is a square shaped muscle on the distal forearm that acts to pronate (turn so the palm faces downwards) the hand. ...

Hand

In the hand, the median nerve supplies motor innervation to the 1st and 2nd lumbricals and the muscles of the thenar eminence of the hand by a recurrent thenar branch. The rest of the intrinsic muscles of the hand are supplied by the ulnar nerve. Lumbrical can refer to: Lumbrical muscle (hand) Lumbrical muscle (foot) Category: ... The thenar eminence is the body of muscle on the palm of the human hand just beneath the thumb. ...

The median nerve innervates the skin of the palmar side of the thumb, the index and middle finger, half the ring finger, and the nail bed of these fingers. The lateral part of the palm is supplied by the palmar cutaneous branch of the median nerve which leaves the nerve proximal to the wrist creases. This palmar cutaneous branch travels in a separate fascial groove adjacent to the flexor carpi radialis. The thumb is one of the five fingers. ... The Index finger The index finger, pointer finger or forefinger is the second digit of a human hand, located between the thumb and the middle finger. ... This article is about the vulgar gesture. ... The ring finger on this hand is extended. ... Nails: left hand, adult human male Anatomy In anatomy, a nail is a horn-like piece at the end of an animal finger or toe. ... This article does not cite any references or sources. ... In human anatomy, the wrist is the flexible and narrower connection between the forearm and the palm. ...

Injury

Injury of median nerve at different levels cause different syndromes. Injury of this nerve at a level above elbow joint results in loss of pronation and a decrease in flexion of the hand at the wrist joint. In the hand, thenar muscles are paralysed and atrophy in time. Opposition and flexion movements of thumb are lost, and thumb and index finger are arrested in adduction and hyperextension position. This appearance of the hand is collectively referred as ape hand deformity. In addition, in palmar side of the hand sensation of lateral part of hand, first three fingers and lateral half of the fourth finger and in dorsal side sensation of distal ⅓ portions of first three fingers and lateral half of distal ⅓ portion of fourth finger is lost. In human and zoological anatomy (sometimes called zootomy), several terms are used to describe the location of organs and other structures in the body of bilateral animals. ... The thenar eminence is the body of muscle on the palm of the human hand just beneath the thumb. ...

Additional images

External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. Duke University is a private coeducational research university located in Durham, North Carolina, USA. Founded by Methodists and Quakers in the present-day town of Trinity in 1838, the school moved to Durham in 1892. ... Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... The University of Kansas (often referred to as KU) is an institution of higher learning in Lawrence, Kansas. ... The University of Michigan, Ann Arbor (U of M, UM or simply Michigan) is a coeducational public research university in the state of Michigan, and one of the foremost universities in the United States. ... The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body (or Grays Anatomy as it has more commonly become known) is an anatomy textbook widely regarded as a classic work on human anatomy. ...

Categories: Peripheral nervous system | Upper limb anatomy Nerves (yellow) Nerves redirects here. ... In humans, the upper limb is an anatomical term for the limb that is attached to the pectoral girdle. ... The brachial plexus is an arrangement of nerve fibres (a plexus) running from the spine (vertebrae C5-T1), through the neck, the axilla (armpit region), and into the arm. ... The dorsal scapular nerve arises from the brachial plexus, specifically from spinal nerves C4 and C5. ... The Nervus suprascapularis (Suprascapular nerve) is a nerve of the plexus brachialis. ... The Nerve to the Subclavius (or subclavian nerve) is a small filament, which arises from the point of junction of the fifth and sixth cervical nerves; it descends to the muscle in front of the third part of the subclavian artery and the lower trunk of the plexus, and is... The long thoracic nerve (external respiratory nerve of Bell; posterior thoracic nerve) supplies the Serratus anterior. ... The Lateral cord is a division of the brachial plexus. ... The musculocutaneous nerve arises from the lateral cord of the brachial plexus, opposite the lower border of the Pectoralis minor, its fibers being derived from the fifth, sixth, and seventh cervical nerves. ... The lateral antibrachial cutaneous nerve (or lateral cutaneous nerve of forearm) (branch of musculocutaneous nerve, also sometimes spelled antebrachial) passes behind the cephalic vein, and divides, opposite the elbow-joint, into a volar and a dorsal branch. ... The Anterior Thoracic Nerves supply the Pectorales major and minor. ... The anterior interosseous nerve (volar interosseous nerve) is a branch of the median nerve that supplies the deep muscles on the front of the forearm, except the ulnar half of the flexor digitorum profundus. ... The palmar branch of the median nerve arises at the lower part of the forearm. ... In the palm of the hand the median nerve is covered by the skin and the palmar aponeurosis, and rests on the tendons of the Flexor muscles. ... In the palm of the hand the median nerve is covered by the skin and the palmar aponeurosis, and rests on the tendons of the Flexor muscles. ... The Medial cord is a division of the brachial plexus. ... Grays Fig. ... The Medial Antebrachial Cutaneous Nerve (internal cutaneous nerve, medial cutaneous nerve of forearm, also sometimes spelled antibrachial) arises from the medial cord of the brachial plexus. ... The Medial Brachial Cutaneous Nerve (lesser internal cutaneous nerve; nerve of Wrisberg, medial cutaneous nerve of arm) is distributed to the skin on the ulnar side of the arm. ... In human anatomy, the ulnar nerve is a nerve which runs from the shoulder to the hand, at one part running near the ulna bone. ... The muscular branches of ulnar nerve, two in number, arise near the elbow: one supplies the Flexor carpi ulnaris; the other, the ulnar half of the Flexor digitorum profundus. ... The dorsal branch of ulnar nerve arises about 5 cm. ... The palmar branch of the ulnar nerve arises about 5 cm above the wrist from where the ulnar nerve splits into palmar and dorsal branches. ... The superficial branch of the ulnar nerve supplies the palmaris brevis and the skin on the ulnar side of the hand, and divides into a proper palmar digital nerve for the ulnar side of the little finger, and a common palmar digital nerve which gives a communicating twig to the... The deep branch of the ulnar nerve, accompanied by the deep branch of the ulnar artery, passes between the abductor digiti minimi and the flexor digiti minimi brevis. ... The Posterior cord is a division of the brachial plexus. ... The upper subscapular (short subscapular) enters the upper part of the Subscapularis, and is frequently represented by two branches. ... The lower subscapular supplies the lower part of the Subscapularis, and ends in the Teres major; the latter muscle is sometimes supplied by a separate branch. ... The Posterior cord is a division of the brachial plexus. ... The axillary nerve is a nerve of the human body, that comes off the posterior cord of the brachial plexus at the level of the axilla (armpit) and carries nerve fibers from C5 and C6. ... The posterior branch of the axillary nerve pierces the deep fascia and is continued as the lateral brachial cutaneous nerve (or lateral cutaneous nerve of arm), which sweeps around the posterior border of the Deltoideus and supplies the skin over the lower two-thirds of the posterior part of this... The radial nerve is a nerve in the human body, that supplies the arm, the forearm and the hand. ... The muscular branches of the radial nerve supply the Triceps brachii, AnconÃ¦us, Brachioradialis, Extensor carpi radialis longus, and Brachialis, and are grouped as medial, posterior, and lateral. ... The inferior lateral cutaneous nerve of arm (also called the inferior lateral brachial cutaneous nerve) is a branch of the radial nerve that provides sensory innervation to the lower, lateral aspect of the arm. ... The posterior cutaneous nerve of arm (internal cutaneous branch of musculospiral, posterior brachial cutaneous nerve) is a branch of the radial nerve that provides sensory innervation for much of the skin on the back of the arm. ... The dorsal antibrachial cutaneous nerve (external cutaneous branch of musculospiral, posterior antebrachial cutaneous nerve, posterior cutaneous nerve of forearm) perforates the lateral head of the Triceps brachii at its attachment to the humerus. ... The superficial branch of the radial nerve passes along the front of the radial side of the forearm to the commencement of its lower third. ... The deep branch of the radial nerve (dorsal or posterior interosseous nerve) winds to the back of the forearm around the lateral side of the radius between the two planes of fibers of the Supinator, and is prolonged downward between the superficial and deep layers of muscles, to the middle... The deep branch of the radial nerve (dorsal or posterior interosseous nerve) winds to the back of the forearm around the lateral side of the radius between the two planes of fibers of the Supinator, and is prolonged downward between the superficial and deep layers of muscles, to the middle... Cutaneous innervation refers to the area of the skin which is supplied by a specific nerve. ...

Contents

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