The Wrist and Hand Flashcards
What action(s) does the extensor carpi radialis longus do
wrist extention and radial deviation
What action(s) does the flexor digitorum superficialis do
finger flexion (esp. PIP)
Describe the path of the abductor pollucis longus
runs over the radial styloid, with more dorsally placed EPB
where does the extensor digiti minimi insert
dorsal aponeurosis of 5th finger
Describe how you would find the ulnar artery
just medial to piseform
What action(s) does the extensor digitorum do
finger extension
Describe how you would find the radial and ulnar styloid processes
ulnar styloid is the posterior part of the ulnar at the distal end (medial)
radial styloid is the lateral part of the radius at the distal end (lateral), inside anatomical snuff box
Describe how you would find the lunate
just medial to the tubercule of the scaphoid (in swimming pool)
Describe how you would find the surface marking of the radio-carpal joint
a line drawn between the styloid processes of the radius and ulanr, being slightly concave distallly and increasinglly curved as it reaches the styloid processes
What action(s) does the flexor carpi radialis do
flexion and radial deviation
Describe how you would find the scaphoid
on the lateral side of the carpus, just proximal to the distal wrist crease you can feel the tubercule
just medial to the radial styloid
can be pinched between thumb and finger if on the tubercule and in the anatomical snuffbox on the dorsal surface
Describe how you would find the first carpo-metacarpal joint
betwen scaphoid and the base of the 1st metacarpal
What action(s) does the flexor carpi ulnaris do
wrist flexion and ulnar deviation
Describe how you would find the extensor retinaculum
from the radial styloid and distal 2cm of radius running obliquely to ulnar styloid and 2cm beyond the base of 5th metacarpal
What action does abductor policis longus do?
thumb abduction
where does extensor carpi ulnaris insert
base of 5th MC
where does the extensor carpi radialis longus insert
base of 2nd MC
What action(s) does the extensor digiti minimi do
5th finger extension
Describe the path of the extensor pollicis longus
turns around the dorsal tubercule of the thumb and then crosses ECRL/ECRB to the distal phalanx of the thumb
What action(s) does the palmar aponeurosis do
wrist flexion
where does the extensor indicis insert
dorsal aponeurosis index finger
Describe how you would find the capitate
slide proximally from 3rd MC (in swimming pool)
What action(s) does the extensor carpi radialis brevis do
wrist extension and radial deviation
Describe how you would find the dorsal tubercule of the radius
on the posterior aspect of the distal end of the radius, roughly in line with the index finger
Describe how you would find the hamate
immediately distal and slightly lateral to piseform
need to apply sufficient pressure through the hypothenar eminence
Describe how you would find the piseform
on medial side of carpus at proximal part of hypothenar eminence- tendon of flexor carpi ulnaris runs proximally from it
Describe how you would find the radial artery at the wrist
lateral to the flexor carpi radiallis tendon, proximal to the wrist joint
What action(s) does the extensor indicis do
index finger extension
Describe how you would find the trapezium
between scaphoid and base of the 1st metacarpal
Describe how you would find the triquetral
under piseform
where does the abductor pollucis longus insert
Base 1st MC
Describe how you would find the trapezoid
between scaphoid and base of 2nd MC
where does the extensor carpi radialis brevis insert
base 3rd MC
What action(s) does the flexor digitorum profundus do
flexion of the fingers (esp. DIP)
Describe how you would find the flexor retinaculum
attaches medially to piseform and the hook of hamate, and laterally to the scaphoid tubercule and to both lips of the groove on trapezium
Describe the path of the extensor digitorum
under the dorsal aponeurosis which comes under the bases of proximal phalanges and then to the base of distal phalanges of the 2nd-5th MC
