The axillary nerve primarily carries fibers from which levels of spinal nerves?

The axillary nerve is primarily associated with the C5 and C6 spinal nerve roots, which originate from the brachial plexus. This nerve is responsible for innervating the deltoid and teres minor muscles, as well as providing sensory innervation to the skin over the lateral aspect of the shoulder.

Understanding the origin of the axillary nerve is crucial for diagnosing and managing conditions that affect shoulder function and sensation. Damage or injury to this nerve can lead to specific motor deficits, such as difficulties in arm abduction, as well as sensory loss in the affected area. Recognizing that C5 and C6 roots contribute to the axillary nerve helps practitioners identify potential injury patterns in clinical assessments, especially in cases of shoulder dislocation or related trauma.