Conceptual

Axillary Nerve Dissection in Human Anatomy using Cadaveric Specimens

The axillary nerve arises from the posterior cord of the brachial plexus and traverses the quadrangular space to supply motor innervation to the deltoid muscle and sensory innervation to its cutaneous distribution. Clinical injury mechanisms include fractures of the surgical neck of the humerus or inferior shoulder dislocations, which compromise vascular structures accompanying the nerve within this anatomical boundary. Dysfunction resulting from these injuries manifests clinically as paralysis preventing shoulder abduction extension coupled with specific areas of dermal anesthesia on the upper lateral arm surface.