A patient with the Guyon canal syndrome may show different patterns of ulnar nerve involvement depending on where the injury is occurring.
Parameters:
(1) sensory function
(2) intrinsic hand muscles supplied by the ulnar nerve (interosseous and lumbrical)
(3) hypothenar muscles
Sensory Function |
Instrinsic Hand Muscles |
Hypothenar Muscles |
Type |
impaired |
impaired |
impaired |
1 |
normal |
impaired |
impaired |
2 |
normal |
impaired |
normal |
3 |
impaired |
normal |
normal |
4 |
Type |
Anatomic Location of Nerve Injury |
1 |
proximal to Guyon canal |
2 |
deep motor nerve branch immediately distal to bifurcation |
3 |
deep motor nerve distal to hypothenar branches |
4 |
superficial branch |
Specialty: Neurology
ICD-10: ,