O&A Wrist And Hand Flashcards
What’s the most common mechanism for traumatic injury to the ulnar collateral ligament of the elbow?
Falling onto an outstretched hand with the elbow extended and the forearm supinated
What capsule is the proximal radioulnar joint within?
The elbow capsule but is a forearm joint
What is the middle radioulnar joint also known as?
Interosseus membrane
What does the articular disc on the ulna have a tight relationship with?
Radial disc
What effect does the action of a push up have on the forearm?
Has a compression force
What helps distribute forces from the radius to the ulna during compression?
Interosseus membrane
What effect does holding a briefcase have on the forearm?
Traction
What helps distribute forces from the radius to the ulna during traction?
Oblique band
What helps the proximal radioulnar ligament roll?
Anullar ligament
How does the ulna and radius move during pronation/supination?
Ulna does not move
Radius rotates around
How does the wrist sit naturally due to the orientation of the radius?
Flexion and adduction
What is the distal radius structure to limit at the radiocarpal joint?
Extension and abduction
What plane does flexion and extension of the thumb occur in?
Coronal
What plane does abduction and adduction of the thumb occur in?
Sagittal
What type of joint is the radiocarpal joint?
Synovial Condyloid
What are the articulating surfaces of the radiocarpal joint?
Distal end of the radius and the articular disc of the distal radioulnar joint articular with the proximal row of carpal bones (excluding pisiform)
What are the ligaments associated with the radiocarpal joint?
Dorsal radiocarpal ligament
Palmar radiocarpal ligament
Ulnar collateral ligament
Radial collateral ligament
What is the movement of the radiocarpal joint?
Flexion/extension
Adduction/abduction
Circumduction
What type of joint is the intercarpal joint?
Plane synovial
What are the articulating surfaces of the intercarpal joint?
Joints between the carpal bones of proximal row
Joints between the carpal bones of distal row
What is the movement of the intercarpal joint?
Flexion/extension
Adduction/abduction
Gliding
What is the midcarpal joint?
Complex joint between the proximal and distal rows of carpal bones
What type of joint is the carpometacarpal of digit 1?
Synovial saddle
What are the articulating surfaces of the carpometacarpal of digit 1?
Between trapezium and base of 1sr metacarpal
What are the movements of the carpometacarpal of digit 1?
Flexion/extension
Adduction/abduction
Circumduction
What type of joint is the carpometacarpal of digit 2-5?
Plane synovial
What are the articulating surfaces of the carpometacarpal of digit 2-5?
Distal surfaces of the carpals of the distal row articulate with the carpal surfaces of the base of metacarpals at the cmc joint
What are the movements of the carpometacarpal of digit 2-5?
Slight flexion
Rotation
What type of joint is the intermetacarpal joint?
Plane synovial
What are the articulating surfaces of the intermetacarpal joint?
Between radial and ulnar aspects of the bases of the metacarpals
What are the movements of the intermetacarpal joint?
Little movement
What type of joint is the metacarpophalangeal joint of digit 1?
Synovial Condyloid
What are the articulating surfaces of the metacarpophalangeal joint of digit 1?
Head of metacarpals articulates with the bases of the proximal phalanges of the MP joints
What is the movements of the metacarpophalangeal joint of digit 1?
Flexion/extension
Adduction/abduction
What type of joint is the metacarpophalangeal joint of digit 2-5?
Synovial Condyloid
What are the movements of metacarpophalangeal joint of digit 2-5?
Flexion/extension
Adduction/abduction
Circumduction
What type of joint is the interphalangeal joint?
Synovial hinge
What are the articulating surfaces of the interphalangeal joint?
Head of phalanges articulate with bases of more distally located phalanges in the IP joints
What are the movements of the interphalangeal joint?
Flexion/extension
