Peripheral Nerve Pathology
A 35-year-old avid cyclist presents with 6 weeks of weakness of finger abduction and adduction in his dominant hand. He denies numbness. On examination, he has weakness of all interossei and hypothenar muscles, but Froment's sign is negative (adductor pollicis function is preserved). There is no sensory loss. He can recall no specific trauma but cycles 200km per week. Regarding ulnar tunnel syndrome and Guyon's canal pathology:
Mark each as TRUE or FALSE
Guyon's canal boundaries include: floor (pisohamate ligament, pisiform, hook of hamate, hypothenar m...
The Shea and McClain classification describes three zones: Zone 1 (proximal to bifurcation, motor + ...
Froment's sign is positive in Guyon's canal compression because the adductor pollicis branch arises ...
Common causes of Guyon's canal compression include: ganglion cysts (most common space-occupying lesi...
Differentiating Guyon's canal from cubital tunnel syndrome: in Guyon's canal, dorsal hand sensation ...
Answer the questions to see explanations
Click T (True) or F (False) for each option