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Flashcards in Exam 3 Deck (17):
1

Bones of the wrist and hand

Carpals: 7 (Hamate, Pisiform, Triquetrum, Lunate, Scaphoid, Capitate, Trapezium, Trapezoid)
Metacarpals: 5
Phalanges: 14

2

Fixed portion vs Adaptive Portion bones

Fixed: provides stable base, distal row of carpals and 2nd and 3rd MC
Adaptive: provides for grasp and manipulation; MC 1, 4, and 5, and phalanges

3

Arches of the hand

Proximal Transverse Arch: Thru carpals, fixed (by flexor retinaculum)
Distal Transverse Arch: thru metacarpal heads, mobile
Longitudinal Arch: mobile

4

Components of the "wrist complex"

Radius, Ulna, and TFCC

5

Radiocarpal (Ellipsoid) Joint

Function: Flexion and Extension, Ulnar and Radial Deviation

6

Midcarpal (Plane - multiple) Joint

Functions: Flexion and Extension, Ulnar and Radial Deviation (major contributor)

7

Common Carpometacarpal (Plane) Joint

Functions: Flexion and Extension (some), Gliding (5th > 4th > 3rd)

8

Thumb Carpometacarpal (Saddle) Joint

Functions: Flexion and Extension, Abduction and Adduction, Rotation during Opposition

9

Pisiform (Plane)

Functions: Improves moment arm of FCU, Gliding

10

TFCC (Ulno-Menisco-Triquetral Joint)

Functions: Pronation and Supination, All Radiocarpal Joint Motions, Clinical Joint

11

Extrinsic Ligaments of the Carpus

Attachments outside of the carpals

Radial Collateral Ligament
Ulnar Collateral Ligament
Palmar Radiocarpal Ligaments
Palmar Ulnocarpal Ligaments
Dorsal Radiocarpal Ligaments

12

Radial Collateral Ligament

Origin: Radial Styloid Process
Insertion: Scaphoid
Surface: Mostly Palmar
Function: Checks ulnar deviation

13

Ulnar Collateral Ligament

Origin: Ulnar Styloid Process
Insertion: Triquetrum, Pisiform, Base of 5th MC
Surface: Mostly palmar
Function: Checks Radial Deviation

14

Palmar Radiocarpal Ligaments

Origin: Distal Radius (Palmar)
Insertion: Lunate, triquetrum, capitate
Surface: palmar
Function: check wrist extension

15

Palmar Ulnocarpal Ligaments

Origin: Distal Ulna (palmar)
Insertion: Lunate, triquetrum, capitate
Surface: palmar
Function: check wrist extension (least important for checking)

16

Dorsal Radiocarpal Ligaments

Origin: Distal Radius (dorsal)
Insertion: Scaphoid, Lunate, Triquetrum
Surface: Dorsal
Function: Check wrist flexion

17

Intrinsic Ligaments of the Carpus

Attachments only to the carpal bones
Palmar Midcarpal Ligaments
Dorsal Midcarpal Ligaments
Interosseus Ligaments