Wrist Flashcards
Name the 8 carpal bones in order
Scare lovers try positions that they can’t handle
Scaphoid lunate triquetrum pisiform trapezium trapezoid capitate hamate
Deqervains involves what tendons ?
Abductor poll longus
Extensor poll brevis
how many bones are there in the wrist and hand?
28 bones
which carpal bones does the radius articulate with?
scaphoid and lunate
what is the capsular pattern of the wrist?
flexion=extension
what is one of the most important ligaments to maintain carpal stability?
radioscapholunate ligament
are palmar or dorsal ligaments stronger.
palmar ligaments
where are the intercarpal joints?
between the individual bones of the proximal row of carpals and the joints between the individual bones of the distal row
where is the midcarpal joint?
between the proximal and distal rows of carpal bones
what forms the proximal transverse arch?
distal row of carpal bones
what forms the distal transverse arch?
passes through the metacarpophalangeal joints
what is the keystone to both the distal transverse arch and the distal longitudinal arch?
second and third metacarpophalangeal joints
what is a hand deformity caused by a median nerve injury?
ape hand deformity
what is a hand deformity caused by a ulnar nerve injury?
bishops hand or benediction hand deformity, and claw fingers
what is a hand deformity caused by a radial nerve injury?
drop wrist deformity
where is the dupuytren contracture usually seen?
in the ring or little finger
what is a boutonnière deformity?
extension of the DIP and the metacarpophalangeal joint and flexion of the PIP
what is a swan neck deformity?
flexion of the DIP and the metacarpophalangeal joint and extension of PIP
what disease is “pill rolling hand” seen on?
parkinson disease
what is “opera glove anesthesia” seen in?
hysteria, leprosy, and diabetes
during wrist flexion where does most movement occur.
in the midcarpal joint
where does ulna deviation primarily occur?
at the radiocarpal joint
where does radial deviation primarily occur?
between the proximal and distal row of carpal bones
is the thumb always involved with power grip or precision grip
precision grip
what are the four different types of power grips?
hook grasp, cylinder grasp, spherical grasp, and fist grasp
are intrinsic muscle more important in power or precision grips.
precision
what are the three types of precision grips?
three-point chuck(three fingered, or digital prehension), lateral key( pulp-to-side pinch, lateral prehension), tip pinch(tip-to-tip prehension)
what is a Murphy’s sign positive for?
lunate dislocation
what is a positive sign for a froments sign?
if when the patient grabs the paper their thumb flexes, because it is a positive for an ulnar nerve injury as adductor pollicis doesn’t work
what is the most common tunnel syndrome in the body?
carpal tunnel syndrome
what four carpal bones does the flexor retinaculum attach to?
scaphoid, pisiform, hook of hamate, trapezium
what two muscles are the border of the snuff box?
extensor pollicis longus and extensor pollicis brevis
what carpal bone can be palpated inside the snuff box?
scaphoid
