Which myotome is primarily involved in elbow flexion and wrist extension?

The myotome primarily involved in elbow flexion and wrist extension is C6. The C6 myotome is responsible for the function of muscles that perform these actions, specifically targeting the biceps brachii for elbow flexion and the muscles responsible for wrist extension, such as the extensor carpi radialis and extensor carpi ulnaris.

Understanding the myotomes and their associated motor functions is crucial in assessing nerve injuries and planning rehabilitation. C5 primarily contributes to elbow flexion through the biceps, but does not encompass wrist extension. C7, while it plays a role in wrist extension, is more associated with elbow extension rather than flexion. C4 is largely involved in shoulder elevation and has no direct role in elbow flexion or wrist extension.

Therefore, C6 is the correct answer, as it includes the muscles that facilitate both elbow flexion and wrist extension effectively.