NERVE LIBRARY · Upper limb

Musculocutaneous nerve

Weak elbow flexion and supination with lateral forearm sensory changes.

Roots / nucleus: C5–C7
Function: Mixed
3D protocols: 1 related protocols

01Course and sensory territory

Its terminal sensory continuation is the lateral antebrachial cutaneous nerve.

02Motor supply

Biceps, brachialis and coracobrachialis.

03Localization clues

Weak elbow flexion and supination with lateral forearm sensory changes.

04Combine the studies

Use LABC sensory and biceps EMG, comparing deltoid, infraspinatus and cervical paraspinals where indicated.

Explore the related 3D protocols

Lateral antebrachial cutaneous sensoryG1 / G2 / Stimulation ↗

These retain the existing source-supported landmarks and references. The 3D model is educational; clinical work requires palpation and measured distances.

Related muscles

Biceps brachii · C5–C6

Connect to a clinical question

Brachial Plexopathy

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References and further reading

Upper Extremity Proximal Mononeuropathies ↗AAPM&R KnowledgeNow · Society educational review · Link accessed 2026-09-08
Brachial Plexopathy: Differential Diagnosis and Treatment ↗AAPM&R KnowledgeNow · Society educational review · Link accessed 2026-09-08

Educational synthesis; independent neuromuscular specialist review is pending. Publication dates and compilation dates are distinct. This is an original teaching synthesis; consult the source for complete methods and criteria.