Unit 1: Lecture 15 Flashcards
The motions of pronation/supination are augmented by what motions AT the wrist?
- flexion/extension
- ulnar/radial deviation
Name the carpal bones
- Pisiform
- Triquetrum
- Hamate
- Capitate
- Scaphoid
- Trapezium
- Trapezoid
- Lunate
Which carpal bone is most often broken?
Scaphoid
Which carpal bone is most often dislocated?
Lunate
Where does the triangular fibrocartilage covering the distal radioulnar joint originate?
Styloid process of ulna
What type of joint is the radiocarpal?
Ellipsoidal
On either side of the hand (radial and ulnar), what are the two ligaments connecting to the carpals?
Ulnar and radial collateral ligaments
What type of joints are the intercarpals?
Plane/gliding
Which joint capsule encloses an articular disk?
Distal Radioulnar joint
What motion do the radio/ulnar collateral ligaments limit?
Radio/ulnar deviation
Joints of the of the proximal carpal row
Joints between scaphoid, lunate, triquetrum, and pisiform
Joints of the of the distal carpal row
Joints between capitate, hamate, trapezoid, and trapezium
Midcarpal joints
Joints between proximal and distal rows
What’s to note about the pisiform?
- Forms the attachment of the flexor and extensor retinaculum on the ulnar side of the wrist
- The ulnar nerve passes between it and the hamate as it enters the palm, creating the Guyon’s Canal
What is the second most broken carpal bone?
Triquetrum
What is the third most broken carpal bone?
Trapezium
