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Lateral Antebrachial Cutaneous Nerve


- Discussion:
    - it is a continuation of musculocutaneous nerve originating from C5 - C8 nerve roots and lateral cord of brachial plexus;
    - be aware of the frequent anatomic variation as it crosses the elbow;
    - becomes superficial at anterolateral aspect of elbow between biceps and brachialis muscle;
           - in some cases, the nerve will pierce directly through the biceps muscle before piercing thru the brachial fascia;
    - usually the nerve pierces the brachial fascia about 3 cm proximal to the lateral epicondyle, and was located about 4.5 cm medial to the lateral epicondyle;
    - it provides sensory innervation to lateral aspect of forearm;

- Bassett's Lesion:
    - occassionally throwing atheletes will complain of parathesias down the forearm w/ forced pronation during the throwing movement;
    - this can be due to impingement of the lateral antebrachial cutaneous nerve from the lateral edge of the biceps, just above the elbow;
    - treatment involves mini-release of the biceps fascia at the level of nerve impingement



Examination of the lateral antebrachial cutaneous nerve: an anatomic study in human cadavers

Painful entrapment of the lateral antebrachial cutaneous nerve at the elbow.

Lateral Antebrachial Cutaneous Neuropathy Following the Long Head of the Biceps Rupture