PROXIMAL ULNAR NERVE LESIONS Chronic ulnar nerve elbow lesions primarily exist at the cubital tunnel or condylar groove. Patients with these lesions present with numbness and tingling, and/or sensory loss…
Within the proximal forearm, the ulnar nerve courses along the length of the medial forearm, lying on the ulnar collateral ligament immediately below the elbow; it subsequently passes between the…
The clinical signs of CTS may be quite variable on neurologic examination; early, there are often no specific findings. In this instance, sometimes typical CTS symptoms can be precipitated by…
PRIMARY MEDIAN TRUNK All median nerve function is potentially compromised with very proximal lesions. In contrast to the patient with carpal tunnel syndrome (CTS) experiencing finger paresthesias, median trunk lesions…
Anteriorly, within the carpal tunnel, the median nerve is bounded by the stiff flexor retinaculum and posteriorly by the carpal bones. In contrast, the ulnar nerve does not travel through…
UPPER ARM The median nerve is derived from the major cervical nerve roots (C5-8) and a minor first thoracic (T1) nerve root contribution. Within the axilla, various fascicles of these…
The axillary (circumflex humeral) (C5, 6) and radial (C6, 7) nerves are the primary derivatives of the posterior cord of the brachial plexus. Descending behind the axillary vessels, the axillary…
The clinical demonstration of weakness and atrophy specific to one of these nerves provides important differential diagnostic clues. Typically, the patient with a primary orthopedic problem, such as a rotator…
MONONEUROPATHY: DIAGNOSTIC STUDIES Sometimes clinical neurologic examination is not precise enough to provide early diagnosis of mononeuropathies. Electrodiagnostic studies are the method of choice for defining the precise anatomic distribution…
Each peripheral nerve has a unique clinical anatomic signature vis-à-vis motor and sensory deficits when these nerves are compromised. This is illustrated by the seemingly complicated cutaneous sensory distribution of…
