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What is the spinal cord segment for the Musculocutaneous nerve?
C5, C6 (also C7, but not listed in little book)
what muscles does the musculocutaneous nerve innervate?
coracobrachialis
biceps brachii
brachialis
What is the sensory distribution of the musculocutaneous nerve?
anterolateral surface of the forearm
(green in the pic on the forearm)
what are the features of musculocutaneous peripheral nerve paralysis?
loss of elbow flexion when supinated
weakened supination
What are the spinal cord segments for the Axillary nerve?
C5, C6
What muscles does the axillary nerve innervate?
deltoid and teres minor
What is the sensory distribution supplied by the axillary nerve?
lateral arm over lower portion of deltoid
(orange in the pic)
what are the motor features of axillary nerve paralysis
loss of shoulder abduction
weakened shoulder ER
What are the spinal cord segments for the Radial nerve?
C5, C6, C7, C8, T1 (T1 has inconsistent contribution. *Note little book does not say C5)
What muscles does the radial nerve innervate?
triceps, anconeus, brachioradialis, supinator,
wrist, finger and thumb extensors
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