Wrist joint Flashcards
What type of joint is the wrist joint?
Synovial joint
condyloid type
Where is the wrist joint located?
Between the forearm
and the hand
What are the articulating surfaces of the wrist joint?
Distal radius
and articular disk
Proximal row of carpal bones - except pisiform
Why does the ulna not articulate in the wrist joint?
Prevented by the articular disk
lies over superior surface of ulna
The carpal bones form a … surface?
Convex surface
The distal radius and articular disk form a … surface?
Concave surface
What are the ligaments of wrist joint?
Palmar radiocarpal
Dorsal radiocarpal
Ulnar collateral
Radial collateral
What does the palmar radiocarpal ligament attach to?
Distal anterior radius
Proximal and distal rows of carpal bones, anterior surfaces
What is the function of the palmar radiocarpal ligament?
Increases stability
Ensures hand follows forearm during supination
What does the dorsal radiocarpal ligament attach to?
Distal posterior radius
Proximal and distal rows of carpal bones, posterior surfaces
What is the function of the dorsal radiocarpal ligament?
Increase stability
Ensures hand follows forearm during pronation
Where does the ulnar collateral ligament attach?
Ulnar sytloid process
Triquetrum and pisiform
Where does the radial collateral ligament attach?
Radial styloid process
Scaphoid and trapezium
What is the blood supply of the wrist joint?
Carpal arches
formed by radial and ulnar arteries
What movements occur at the wrist joint?
Flexion
Extension
Abduction
Adduction
