Compressive Radial Mononeuropathy

Excerpt

Compressive radial mononeuropathy is a compressive neuropathy of the radial nerve from prolonged, direct pressure onto the upper medial arm or axilla by an object or surface. The radial nerve comprises the C5 to T1 nerve roots, which arise from the posterior segment of the brachial nerve plexus. It initially runs deep to the axillary artery before passing inferior to the teres minor and then wrapping down the medial aspect of the humerus, where it lies in the spiral groove. A prolonged period of immobilization compresses the radial nerve, leading to nerve palsy and causing motor and sensory deficits.