Musculocutaneous Nerve

Musculocutaneous Nerve

Key Points:

• Critical function provided is of elbow flexion.
• Innervates the coracobrachialis, biceps brachii, and brachialis muscles, and provides sensation to the lateral cutaneous aspect of the forearm.
• Originates from roots C5, C6, C7.

EXAMINATION
Physical examination of the musculocutaneous nerve includes both motor and sensory examination. The motor examination involves testing the coracobrachialis, biceps brachii and brachialis muscles. Of the three, the biceps brachii and brachialis are the easiest to test “” by testing elbow flexion.
 
Detailed Examination Link:
Biceps brachii
 
Brachialis
 
Coracobrachialis

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Musculocutaneous Nerve

Key Points:

• Critical function provided is of elbow flexion.
• Innervates the coracobrachialis, biceps brachii, and brachialis muscles, and provides sensation to the lateral cutaneous aspect of the forearm.
• Originates from roots C5, C6, C7.

EXAMINATION
Physical examination of the musculocutaneous nerve includes both motor and sensory examination. The motor examination involves testing the coracobrachialis, biceps brachii and brachialis muscles. Of the three, the biceps brachii and brachialis are the easiest to test “” by testing elbow flexion.
 
Detailed Examination Link:
Biceps brachii
 
Brachialis
 
Coracobrachialis

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