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OCS Wrist/Hand


4 stage Tendon Gliding A: open hand, B: hook fist, C: Straight fist, D: Composite fist
Ganglion cystic, mucin filled mass the protrudes from the synovial membrane of the tendon sheath or joint capsule.
Dupuytren Disease Progressive fibrosis of the palmar aponeurosis, natatory ligaments, and digital fascia. Observed as flexion contractures fo the MP and PIP of the ring and small fingers. Often bilaeral.
Mallet Finger disruption of the extensor tendon in Zone 1. Often casued by a forceful flexion fo the extended DIP. Observed as fixed flexion at the DIP.
Swan Neck Deformity Chronic injury of the entire extensor mechanism. Observed as hyperextension at the PIP and flexion at the DIP.
Boutonniere Deformity Caused from Zone III injury to the PIP from foreceful flexion of the extended finger. The central slip and triangular ligament may rupture and the lateral bands will slip to the volar side of the joint. Observed as PIP flexion and DIP extension.
Neurapraxia Simplest form of nerve injury. Transient reduction or complete blocking of nerve conduction at the lesion site.
Axonotmesis More severe nerve injury seen with crush or traction injuries. the axon is damaged but the nerve sheath remains intact.
Neurotmesis Most severe injury. The damage transects the entire nerve, interrupts organization and requires surgical repair.
Median Nerve: Sensory Sensation over the lateral aspect of the palm and volar suface of the lateral 3 1/2 fingers.
Median Nerve: Motor first and second lumbrical, FPB, APB, and OP.
Ape Hand Deformity observed with Median nerve palsy. Thumb opposition is lost.
Ulnar Nerve: Sensory medial aspect of the palm and volar aspect of the medial 1 1/2 fingers.
Ulnar nerve: Motor hypothenar muscles, dorsal and palmar interossei, 3rd and 4th lumbrical muscles, deep head of the FPB muscle and AP muscle.
Claw Hand aka intrinsic-minus. ED muscle is unopposed at the MP resulting in excessive MP joint extension and PIP flexion.
Radial Nerve: Sensory lateral and dorsum of the had and lateral 3 1/2 fingers.
Radial Nerve: Motor Motor changes are not seen in the radial nerve damage at the wrist.
Created by: aschroeder0614