Which muscle is used to record the axillary median nerve conduction?

The deltoid muscle is the correct choice for recording axillary median nerve conduction because it is primarily innervated by the axillary nerve, which is responsible for the motor function of this muscle. The axillary nerve emerges from the brachial plexus and innervates the deltoid and teres minor muscles, playing a vital role in shoulder abduction.

In nerve conduction studies, the deltoid muscle is often assessed to evaluate the integrity and function of the axillary nerve since it reflects the electrical activity and any potential pathology affecting this nerve. By measuring the response in the deltoid, clinicians can gain valuable insights into the condition of the nerve and surrounding musculature.

In contrast, the biceps and triceps are innervated by the musculocutaneous and radial nerves, respectively, and thus would not provide the necessary data for axillary nerve conduction studies. Similarly, the extensor digitorum communis is primarily innervated by the radial nerve and would also be unsuitable for evaluating the axillary nerve. Therefore, the deltoid muscle serves as the most appropriate site for assessing axillary median nerve conduction.