Question

what is the best muscle test for c5?

biceps

deltoids

extensor carpi radialis

triceps

Explanation:

C5 spinal nerve innervates the deltoid muscle, making deltoid strength testing the most specific and best muscle test for assessing C5 nerve function. Biceps are innervated by C5-C6, extensor carpi radialis by C6-C7, and triceps by C7-C8, so they are not the optimal sole test for C5.

Answer:

B. Deltoids