Wrist Joint Flashcards
What are the articulating surfaces of the wrist joint
Distally - proximal row of carpal bones (except pisiform)
Proximally - distal end of radius and articular disk
Where does the joint capsule of the wrist joint attach
Fibrous outer layer attaches to radius, ulna and proximal row of carpal bones
What are the major ligaments of the wrist joint
Palmar radiocarpal
Dorsal radiocarpal
Ulnar collateral
Radial collateral
Where does the palmar radiocarpal ligament run
From radius to both rows of carpal bones on palmar side
What is the function of the palmar radiocarpal ligament
Increases stability
Ensure that the hand follows the forearm during supination
Where does the dorsal radiocarpal ligament run
From radius to both rows of carpal bones on dorsal side
What is the function of the dorsal radiocarpal ligament
Contributes to stability of wrist
Ensures hand follows forearm during pronation
Where does the ulnar collateral ligament run
From ulnar styloid process to triquetrum and pisiform
What does the ulnar collateral ligament do
Prevent excessive lateral joint displacement
Where does the radial collateral ligament run
From radial styloid process to scaphoid and trapezium
What does the radial collateral ligament do
Prevents excessive lateral joint displacement
Where does the wrist joint receive its blood supply
From branches of dorsal and palmar carpal arches
Which nerve innervates the wrist joint
Anterior interosseous branch (median nerve)
Posterior interosseous branch (radial branch)
Deep and dorsal branches of the ulnar nerve
What type of joint is the wrist joing
Ellipsoid type synovial joint
What muscles produce flexion at the wrist joint
Flexor carpi ulnaris
Flexor carpi radialis
Flexor digitorum superficialis
