Name that Deformity
PIP hyperextension
DIP flexion
Swan neck deformity
1st dorsal compartment tenosynovitis
or
Tenosynovitis of APL and EPB
de Quervain's tenosynovitis
Innerves the extensors
Radial N
The primary mover for supination
Biceps brachii
Median N compression at the carpal tunnel with wrist flexion
Phalen's test
PIP flexion
DIP extension/hyperextension
Boutonniere deformity
Scaphoid vascular supply is greatest at the...
Distal pole
Innervates AP
Ulnar N
This pinch utilizes AP and 1st dorsal interossei
Key/lateral pinch
Nerve precussion at compression sites (med, ulnar, or radial)
Tinel's sign
DIP flexion
Mallet finger
Inflammation of the FDS tendon at the A1 pulley, catching catching.
Trigger digit
This nerve innervates sensation to the tips of digits 1-3
Median N
Lumbrical's origin
FDP tendon
1st dorsal compartment tenosynovitis (de Quervain's)
Finkelstein's test
RF/SF MP hyperextension and PIP/DIP flexion
Claw hand
Bone spurs at Lister's tubercle or distal radius fractures can rupture this extensor tendon.
EPL
The hand of benediction develops with prolonged compression of this nerve.
Median N
These two muscles divide and emerge to form the camper's chiasm.
FDS and FDP
Dupuytren's disease
Tabletop test
Stiff hand posture is described as...
resting MP extension + PIP/DIP flexion
Thumb MP UCL injury (acute vs chronic)
Skier's/game keeper's thumb,
Irritation of this nerve evokes burning paresthesias to the dorsum of the webspace.
Radial N (DSRN)
Activation of this muscle helps counter a swan neck deformity.
FDS
Compensatory FPL activation during key pinch
Froment's sign