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

Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Friday, April 6, 2012 1:28 pm