|
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. 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 ...
Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ...
The anterior compartment of the arm is known as the flexor compartment as flexion is its main action. ...
The Lateral cord is a division of the brachial plexus. ...
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. ...
Elseviers logo. ...
The Lateral cord is a division of the brachial plexus. ...
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. ...
Location The pectoralis minor muscle takes its origin from the 3rd to 5th ribs, near their costal cartilages. ...
The Cervical Nerves—The posterior division of the first cervical or suboccipital nerve is larger than the anterior division, and emerges above the posterior arch of the atlas and beneath the vertebral artery. ...
Path It penetrates the Coracobrachialis muscle and passes obliquely between the Biceps brachii and the Brachialis, to the lateral side of the arm; a little above the elbow it pierces the deep fascia lateral to the tendon of the Biceps brachii and is continued into the forearm as the lateral antibrachial cutaneous nerve. Coracobrachialis is one of the three muscles that attach to the coracoid process of the scapula. ...
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. ...
The lateral antibrachial cutaneous nerve (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. ...
In its course through the arm it innervates the Coracobrachialis, Biceps brachii, and the greater part of the Brachialis.
- The branch to the Coracobrachialis is given off from the nerve close to its origin, and in some instances as a separate filament from the lateral cord of the plexus; it is derived from the seventh, cervical nerve.
- The branches to the Biceps brachii and Brachialis are given off after the musculocutaneous has pierced the Coracobrachialis; that supplying the Brachialis gives a filament to the elbow-joint.
- The nerve also sends a small branch to the bone, which enters the nutrient foramen with the accompanying artery.
The Lateral cord is a division of the brachial plexus. ...
Elbow redirects here. ...
Irregularities The musculocutaneous nerve presents frequent irregularities.
It may adhere for some distance to the median and then pass outward, beneath the Biceps brachii, instead of through the Coracobrachialis.
Some of the fibers of the median may run for some distance in the musculocutaneous and then leave it to join their proper trunk; less frequently the reverse is the case, and the median sends a branch to join the musculocutaneous.
The nerve may pass under the Coracobrachialis or through the Biceps brachii.
Occasionally it gives a filament to the Pronator teres, and it supplies the dorsal surface of the thumb when the superficial branch of the radial nerve is absent. The Pronator teres muscle is a muscle of the human body, in the forearm. ...
Damage Although rare, the musculocutaneous n. can be affected through compression due to hypertrophy or entrapment between the biceps aponeurosis & brachialis fascia or it may be injured through stretch as occurs in dislocations & sometimes in surgery. The Brachial Fascia (deep fascia of the arm) is continuous with that covering the Deltoideus and the Pectoralis major, by means of which it is attached, above, to the clavicle, acromion, and spine of the scapula; it forms a thin, loose, membranous sheath for the muscles of the arm, and...
Isolated injury, causes weakness of elbow flexion & supination of the forearm.
A discrete sensory disturbance is present on the radial side of the forearm.
The nerve is usually involved in an upper brachial plexus palsy
Injury can occur before entering the coracobrachialis due to dislocation or apparently due to stretch due to throwing injury
Heavy backpacks can cause damage to the upper trunk of the brachial plexus – dysfunction can be severe & prolonged with similar injury as occurs with Erb's palsy from breech deliveries. Early detection is important – the combination of time, avoidance of wearing a backpack, and strengthening of the shoulder muscles will probably be effective. Erbs Palsy, also known as Brachial Plexus Paralysis, is a condition which mainly due to birth trauma can affect 1 or all of the 5 primary nerves that supply the movement and feeling to an arm. ...
Breech, by W.Smellie, 1792 A breech birth (also known as breech presentation) refers to the position of the baby in the uterus such that it will be delivered buttocks first as opposed to the normal head first position. ...
A backpack A backpack is, in its simplest form, a cloth sack carried on ones back and secured with two straps that go over the shoulders (called shoulder straps) and below the armpits. ...
Distal to the coracobrachialis, the MC cause appears to be weight lifting – either through compression due to hypertrophy or entrapment between the biceps & brachialis, the nerve may lead to a painless loss of muscle strength in flexion & supination of the forearm. Initial treatment should include avoidance of biceps curls or other biceps exercises. Weightlifting is a sport where competitors attempt to lift heavy weights mounted on steel bars. ...
Bodybuilder Markus Rühl has marked hypertrophy of skeletal muscle. ...
Initial treatment should include avoidance of biceps curls or other biceps exercises.
Additional images Cross-section through the middle of upper arm. Image File history File links Gray413. ...
| The veins of the right axilla, viewed from in front. Image File history File links Gray576. ...
| Plan of brachial plexus. Image File history File links No higher resolution available. ...
| The right brachial plexus (infraclavicular portion) in the axillary fossa; viewed from below and in front. Image File history File links Gray809. ...
| Cutaneous nerves of right upper extremity. Anterior view. Image File history File links Download high-resolution version (326x900, 44 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Median nerve Axillary nerve Ulnar nerve Wikipedia:Grays Anatomy images with missing articles 17 Musculocutaneous nerve List...
| Diagram of segmental distribution of the cutaneous nerves of the right upper extremity. Anterior view. Image File history File links No higher resolution available. ...
| Brachial plexus Image File history File links No higher resolution available. ...
|
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. ...
eMedicine is an online clinical medical knowledge base that was founded in 1996. ...
The University of Kansas (often referred to as KU) is an institution of higher learning in Lawrence, Kansas. ...
Memorial University of Newfoundland, (popularly known as Memorial University or MUN) is a comprehensive university located primarily in St. ...
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, commonly known as Grays Anatomy after Henry Gray, is an anatomy textbook widely regarded as a classic work on human anatomy. ...
| v • d • e Nerves of upper limbs (primarily): the brachial plexus | supraclavicular: dorsal scapular - suprascapular - to the subclavius - long thoracic
infraclavicular: 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. ...
lateral cord: musculocutaneous (lateral cutaneous of forearm) - lateral pectoral - lateral head of median (anterior interosseous, palmar, common palmar digital, proper palmar digital) The Lateral cord is a division of the brachial plexus. ...
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 median nerve is a nerve that runs down the arm and forearm. ...
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. ...
medial cord: medial pectoral - medial cutaneous of forearm - medial cutaneous of arm - ulnar (muscular branches, dorsal branch, palmar branch, superficial branch, deep branch) - medial head of median The Medial cord is a division of the brachial plexus. ...
Grays Fig. ...
The Medial Antibrachial Cutaneous Nerve (internal cutaneous nerve, medial cutaneous nerve of forearm, also sometimes spelled antebrachial) 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 median nerve is a nerve that runs down the arm and forearm. ...
posterior cord: subscapular (upper, lower) - thoracodorsal - axillary (superior lateral cutaneous of arm) - radial (muscular, inferior lateral cutaneous of arm, posterior cutaneous of arm, posterior cutaneous of forearm, superficial branch, deep branch, posterior interosseous) 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 carriers 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, Anconæus, 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 of the upper limbs Cutaneous innervation refers to the area of the skin which is supplied by a specific nerve. ...
| |
Feeds |
Contact