Chapter 24 - The Forearm, Wrist, Hand, and Fingers Flashcards
Colles fracture
distal radius fx, usually broke in extension. can be associated with dinner fork deformity
madelung deformity
congenital, causes the hand and wrist to be volarly displaced
Smith fractures
distal radius fx, associated with a break in flexion
ape hand
median neuropathy
weakness/atrophy of muscles in thenar eminence, pulls thumb parallel with fingers
bishop’s deformity
weakness/atrophy of hypothenar, interossie, medial lumbricals
medial fingers assume resting flexed position
inhibition of ulnar nerve (benediction deformity)
claw hand
ulnar / median nerve involvement
weakness/atrophy of hand intrinsic muscles results in extension of MCP joint and flexion of PIP and DIP
Dupuytren’s Contracture
involved finger’s assume excessively flexed resting position
inability to passively/activiely extend the MCP and PIP joints of involved finger
flexion contracture of MCP and PiO joint caused by shortening or adhesion of palmar fascia
Swan-Neck Deformity
flexion of MCP and DIP joints in and hyperextension of PIP
caused: volar plate, malunion, trauma to the finger flexor or extensor muscles, rheumatoid arthritis
Volkmann’s Ischemic Contracture
Flexion contraction of the wrist and fingers (cli fingers), limited extension
decrease in blood supply to the forearm muscles
jersey finger
avulsion of the flexor digitorum profundus tendon
inability to actively flex the DIP joint
Mallet finger
avulsion of the extensor digitorum longus tendon
inability to actively extend the distal phalanx
Boutonniere deformity
rupture of the central extensor tendon
Extension of MCP and DIP and flexion of the PIP
pseudo-boutonniere deformity
a rupture of the volar plate
