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 ?
Median nerve CSA values were greater in active patients compared to inactive patients.
The average rheobase voltage from the median nerve was significantly lower than from the ulnar nerve.
Ramus communicans, which is located between median nerve and ulnar nerve, is present within the fat tissue.
Clinical and electrodiagnostic abnormalities of the median nerve in dental assistants.
The intent is to lower the pressure exerted by the flexor retinaculum on the median nerve, potentially offering a longer-lasting solution than simple blind injection.
Median nerve dysfunction may be a cause for urgent operative intervention.
This rare congenital abnormality occurs most frequently in the distribution of the median nerve in the upper, and medial plantar nerve in the lower, extremity.
The symptoms of CTS are caused by compression of the median nerve by these rigid structures.
The precise anatomical site is along the median nerve pathway, two finger widths below the wrist crease.
Techniques used for TM sought to address any fluid retention in the carpal tunnel region, reduce connective tissue adhesions and decrease hypertonicity at possible points of nerve entrapment along the brachial plexus and median nerve pathways.