Lecture 10 - Wrist & Hand Flashcards
1
Q
What are the 4 bones of the proximal row of the carpals?
A
- scaphoid
- lunate
- triquetrum
- pisiform
2
Q
What is the scaphoid?
A
- The 1st of the 4 proximal carpal bones
- Articulates with the radius proximally, the trapezoid & trapezium distally, & the lunate medially
3
Q
What is the lunate ?
A
- The 2nd of the 4 proximal carpal bones
- Articulates with the radius proximally, the capitate & hamate dismally, the scaphoid laterally, & the triquetrum medially
4
Q
What is the triquetrum?
A
- The 3rd of the 4 proximal carpal bones
- Articulates with the lunate laterally, the hamate dismally, & has a facet for the pisiform
5
Q
What is the pisiform?
A
- The 4th of the 4 proximal carpal bones
- Articulates with the anterior surface of the triquetrum
6
Q
What are the 4 bones of the distal row of the carpals?
A
- trapezium
- trapezoid
- capitate
- hamate
7
Q
What is the trapezium?
A
- The 1st of the 4 distal carpal bones
- Articulates with the scaphoid proximally, the 1st & 2nd metacarpals dismally, & the trapezoid medially
8
Q
What is the trapezoid?
A
- The 2nd of the 4 distal carpal bones
- Articulates with the scaphoid proximally, the 2nd metacarpal dismally, the trapezium laterally, & the capitate medially
9
Q
What is the capitate?
A
- The 3rd of the 4 distal proximal bones
- Articulates with the scaphoid & lunate proximally, the trapezoid laterally, the hamate medially, & primarily with the 3rd metacarpal distally
10
Q
What is the hamate?
A
- The 4th of the 4 distal carpal bones
- Articulates with the lunate & triquetrum proximally, the 4th & 5th metacarpals distally, & the capitate laterally
- Hook of Hamate: bony extension located on the anterior side of the hamate bone
11
Q
What are the 2 synovial joints of the carpals?
A
- radial (lateral) collateral ligament: runs from the radial styloid process to the scaphoid & trapezium
- ulnar (medial) collateral ligament: runs from the ulnar styloid process to the triquetrum & pisiform
12
Q
What are the bones of the hand called?
A
- metacarpals
- 5 metacarpals make up the palm of the hand
- Numbered 1 - 5 beginning with the thumb
13
Q
What are the 2 joints of the metacarpals?
A
- carpometacarpal (CMC) joint
- metacarpophalangeal (MCP) joint
14
Q
What is the carpometacarpal (CMC) joint?
A
- The proximal joint connecting the thumb
- The 1st carpometacarpal joint is a synovial saddle joint
15
Q
What is the metacarpophalangeal (MCP) joint?
A
- The distal joint between the metacarpal & the phalanges (the knuckles)
- Synovial condyloid joints