median nerve


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Related to median nerve: median nerve test, median nerve injury

me·di·an nerve

[TA]
formed by the union of medial and lateral roots from the medial and lateral cords of the brachial plexus, respectively; it supplies all the muscles in the anterior compartment of the forearm with the exception of the flexor carpi ulnaris and ulnar half of the flexor digitorum profundus; it passes through the carpal tunnel to supply the thenar muscles (except adductor pollicis and the deep head of flexor pollicis brevis) via its recurrent thenar branch; its sensory fibers are distributed to the skin of the palmar and distal dorsal aspects of the radial three-and-a-half digits and adjacent palm. The median nerve is most commonly injured through compression in carpal tunnel syndrome, resulting in a loss of ability to oppose the thumb (thus creating "ape hand") and loss of sensation over the radial portion of the hand.
Synonym(s): nervus medianus [TA]

median nerve

one of the terminal branches of the brachial plexus that extends along the radial parts of the forearm and the hand and supplies various muscles and the skin of these parts. It arises from the brachial plexus by two large roots, one from the lateral and one from the medial cord. The roots unite to form the trunk of the nerve that courses down the arm with the brachial artery. The median nerve usually has no branches above the elbow. It has a few articular branches to the elbow joint and muscular branches to the forearm; the anterior interosseous nerve; the palmar branch; the muscular branch in the hand; the first, second, and third palmar digital nerves; and the proper digital nerves. Compare musculocutaneous nerve, radial nerve, ulnar nerve.

median nerve

A primarily sensory nerve of the arm, located at the medial and lateral cords of the brachial plexus at C6–T1 of the brachial plexus.

Route
Deep within the medial bicipital furrow to the cubital fossa, passing between the two heads of the pronator teres, then descending deep to the superficial flexor of the digits and flexor retinaculum.

Branches, forearm
• Anterior interosseous branch.
• Palmar cutaneous branch.
 
Branches, hand
• Recurrent branch to muscles of the thenar compartment, which innervates the flexor pollicis bevis, abductor pollicis brevis and opponens pollicis.
• Digital cutaneous branches, which supply the:
   – Lateral (radial) three and a half digits on palmar side;
   – Index, middle and ring finger on dorsum of hand.
• Motor innervation to the first and second lumbricals of hand.

me·di·an nerve

(mē'dē-ăn nĕrv) [TA]
Formed by the union of medial and lateral roots from the medial and lateral cords of the brachial plexus, respectively; it supplies all the muscles in the anterior compartment of the forearm with the exception of the flexor carpi ulnaris and ulnar half of the flexor digitorum profundus; it passes through the carpal tunnel to supply the thenar muscles (except adductor pollicis and the deep head of flexor pollicis brevis) via its recurrent thenar branch; its sensory fibers are distributed to the skin of the palmar and distal dorsal aspects of the radial three-and-a-half digits andadjacent palm. The median nerve is most commonly injured through compression in carpal tunnel syndrome, resulting in a loss of ability to oppose the thumb (thus creating "ape hand") and loss of sensation over the radial portion of the hand.

median nerve

One of the two major nerves of the arm, supplying most of the muscles and providing sensation in the two-thirds of the hand on the thumb side.

Median nerve

A nerve which runs through the wrist and into the hand. It provides sensation and some movement to the hand, the thumb, the index finger, the middle finger, and half of the ring finger.

me·di·an nerve

(mē'dē-ăn nĕrv) [TA]
Formed by the union of medial and lateral roots from the medial and lateral cords of the brachial plexus, respectively; it supplies all the muscles in the anterior compartment of the forearm with the exception of the flexor carpi ulnaris and ulnar half of the flexor digitorum profundus.

median

1. situated in the median plane or in the midline of a body or structure.
2. the perpendicular line that divides the area of a frequency curve into two equal halves.

median calving date
the number of days between the first calving in the herd and the 50th percentile calving; an excellent measure of fertility status of seasonally calving herds; in dairy herds the target is 18 days.
median eminence
part of the hypophysis.
median nerve
see Table 14.
median nerve block
the anesthetic agent is injected on the medial aspect of the forelimb, just distal to the elbow. An area encircling most of the fetlock and pastern is desensitized.
median nerve injury
results in overextension and dropping of the carpus.
References in periodicals archive ?
Clinical results of contralateral C7 root neurotization to the median nerve in brachial plexus injuries with total root avulsions.
Neuropathy of median nerve due to compression beneath the transverse carpal ligament.
Quality of life and health of people undergoing median nerve decompression surgery.
Motor exam of intrinsic musculature innervated by the recurrent motor branch of the median nerve includes assessment of thumb abduction strength (assessed by applying resistance to the metacarpophalangeal joint [MCPJ] base towards the palm in the position of maximal abduction) and opposition strength (assessed by applying force to the MCPJ from the ulnar aspect).
Unusual formation of the median nerve associated with the third head of biceps brachii.
Patients with an entrapped median nerve may experience symptoms of numbness, paraesthesia, weakness and muscular atrophy (Scanlon, & Maffei, 2009).
Radial nerve Arm or wrist extension Median nerve Forearm pronation, thumb flexion Ulnar nerve Flexion of the fifth finger Musculocutaneous nerve Arm flexion Source: Authors.
The Tinel's and Phalen's tests were negative for bilateral median nerve involvement at the wrists.
Relationship Lateral to the median Lateral to the median to median nerve, and then it nerve, and then it nerve crosses deep to the crosses superficial to median nerve, but is the median nerve, but is separated from it by the separated from it by the ulnar head of the humeral head of the pronator teres.
KEY WORDS: Electrodiagnostic, Entrapment neuropathy, Median nerve, Ulnar nerve.
Among the 202 operated patients, 97(48%) had median nerve damage, in 91(45%) the ulnar nerve was injured and 14(7%) had radial nerve injury.