II. Causes: Tenosynovitis
III. Causes: Peripheral Neuropathy (Neuropraxia)
- Digital Neuropathy
- Anterior interosseus nerve entrapment
- Weakness of pinch and grip, without associated pain
- Posterior interosseous nerve entrapment
- Weakness of fingers and wrist, WITH associated pain
- In contrast to C7 nerve root, posterior interosseous has no triceps or wrist flexion weakness
-
Radial Nerve entrapment (Radial Tunnel)
- Radial Forearm pain
-
Median Nerve entrapment (Carpal Tunnel)
- Paresthesias and numbness in radial 3.5 fingers
- In contrast to C6-7 nerve roots, Carpal Tunnel has no triceps or wrist extension weakness
-
Ulnar Nerve entrapment (Cubital Tunnel)
- Flexor digitorum profundus weakness with numbness and Paresthesias in ulnar 1.5 fingers
- In contrast to C8-T1 nerve roots, Cubital Tunnel has no thumb IP flexion weakness
IV. Causes: Vascular
- Hypothenar Hammer Syndrome
- Digital Ischemia
- Baseball pitchers
- Baseball catchers
- Handball players