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The median nerve is a nerve in humans and other animals in the upper limb. It is one of the five main nerves originating from the brachial plexus. The median nerve originates from the lateral and medial cords of the brachial plexus, [1] and has contributions from ventral roots of C6-C7 (lateral cord) and C8 and T1 (medial cord). [1] [2]
The superficial head is usually innervated by the recurrent branch of the median nerve. [5] The deep part is often innervated by the deep branch of ulnar nerve (C8 and T1 roots). [6] [7] There are normal variations. In a Cannieu-Riche anastomosis, fibers from the deep branch of ulnar nerve innervate the opponens pollicis and/or abductor ...
The recurrent branch of the median nerve is also colloquially called the "Million Dollar Nerve", because injury to this nerve during carpal tunnel surgery can lead to a million dollar lawsuit. Injury to this nerve can lead to loss of function of the thumb. Such injury can happen if the flexor retinaculum is transected too radially. The ...
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Origin: Upper 3/4 of the anterior and medial surfaces of the body of the ulna, interosseous membrane and deep fascia of the forearm: Insertion: Base of the distal phalanges of the fingers: Artery: Anterior interosseous artery: Nerve: Lateral part of the muscle by median (anterior interosseous), medial (ulnar) part of the muscle by muscular ...
Origin: Medial epicondyle of the humerus (common flexor tendon) as well as parts of the radius and ulna: Insertion: Anterior margins on the base of the middle phalanges of the four fingers: Artery: Radial artery: Nerve: Median nerve: Actions: Flexor of fingers (primarily at proximal interphalangeal joints) Antagonist: Extensor digitorum muscle ...
Origin: The middle 1/2 of the anterior surface of the radius and adjacent to the interosseus membrane. Insertion: The base of the distal phalanx of the thumb: Artery: Anterior interosseous artery: Nerve: Anterior interosseous nerve (branch of median nerve) (C8, T1) Actions: Flexion of the thumb: Antagonist: Extensor pollicis longus muscle ...
Details; Origin: Medial epicondyle of humerus (common flexor tendon): Insertion: Bases of second and third metacarpal bones: Artery: Ulnar artery: Nerve: Median nerve: Actions: Flexion and abduction at wrist