①Recurrent branch of the median nerve to the thenar muscles: weakness of the abductor pollicis brevis (thumb abduction), flexor pollicis brevis (thumb flexion), and opponens pollicis (thumb opposition)
② ulnar nerve) between the hook of the hamate and the pisiform bone in a fibroosseous tunnel → Guyon's canal
weakness on wrist flexion/adduction, finger abduction/adduction, and flexion of the fourth/fifth digits.
The hypothenar eminence can appear flattened due to denervated muscle atrophy...
musculoskeletal
anatomy
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