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Median Nerve

The median nerve passes down the full length of the arm into the hand. It's a branch of the brachial plexus and is one of the main nerves in the arm. It starts before the third part of the axillary artery at the lateral side. The brain stem is usually under the pectoralis minor muscle, by the Y-shaped merge of its medial and lateral heads. From the lateral cord, the lateral head lifts with the musculocontaneous. From the medial cord, the medial head lifts with the ulnar. It passes over the...

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    Full Median Nerve Description

    [Continued from above] . . . third portion of the axillary artery. The median nerve is most often injured with a wound to the axilla.

    The median nerve is responsible for controlling the forearm and hand muscles. This allows the wrist, thumb and fingers to bend and move. It also enables the rotation of the forearm palm-inwards. Feelings from the index finger, thumb, middle finger, part of the ring finger, and the area of the palm at the base of these fingers and thumb are conveyed by way of the median nerve.