22: Arthrology: Wrist And Hand

Question 1

Radiocarpal joint type

Answer 1

Condylar synovial joint

Question 2

Six ligaments of the radiocarpal joint

Answer 2

1. Palmar radiocarpal L
2. Dorsal radiocarpal L
3. Palmar ulnocarpal L
4. Dorsal ulnocarpal L
5. Radial collateral L of wrist
6. Ulnar collateral L of wrist

Question 3

Palmar radiocarpal L: two bands

Answer 3

1. Radius -> across scaphoid -> lunate

2. Radius -> capitate

Question 4

Dorsal radiocarpal L

Answer 4

Radius -> across lunate -> triquetrum

Question 5

Palmar ulnocarpal L: two bands

Answer 5

1. Ulnar head -> lunate

2. Ulnar head -> triquetrum

Question 6

Dorsal ulnocarpal L

Answer 6

Ulnar head -> triquetrum

Question 7

Radial collateral L of wrist

Answer 7

Radial styloid process -> scaphoid

Question 8

Ulnar collateral L of wrist

Answer 8

Ulnar styloid process -> triquetrum (via pisiform)

Question 9

Intercarpal joint type

Answer 9

Planar synovial joints

Question 10

Articular capsule of intercarpal joints

Answer 10

Continuous, common joint space between all intercarpal and carpometacarpal joints (except first carpometacarpal joint)

Question 11

Four ligaments of the intercarpal joints

Answer 11

1. Posterior intercarpal L
2. Anterior intercarpal L
3. Interosseous intercarpal L
4. Pisohamate L

Question 12

Pisiform joint

Answer 12

Pisiform + triquetrum

Question 13

Midcarpal joint type

Answer 13

Sellar synovial joint

Question 14

Carpometacarpal joint types

Answer 14

1st: sellar

2-5th: planar synovial joints

Question 15

Four ligaments of the carpometacarpal joints

Answer 15

1. Palmar carpometacarpal L
2. Dorsal carpometacarpal L
3. Pisometacarpal L
4. Radiate carpal L

Question 16

Pisometacarpal L: in junction with what L and is a continuation of what tendon?

Answer 16

In junction with pisohamate L; continuation of flexor carpi ulnaris T

Question 17

Radiate carpal L

Answer 17

Capitate -> bases of metacarpals

Question 18

Intermetacarpal joint type

Answer 18

Planar synovial joints

Question 19

Articular capsule of the intermetacarpal joints

Answer 19

Capsule between bases of 1st and 2nd is separate from that shared between the rest of the wrist

Question 20

Three ligaments of the intermetacarpal joints

Answer 20

1. Dorsal intermetacarpal L
2. Palmar intermetacarpal L
3. Interosseous intermetacarpal L

Question 21

Metacarpophalangeal joints

Answer 21

Condylar synovial joints

Question 22

Articular capsule for metacarpophalangeal joints

Answer 22

Separate for each joint

Question 23

Four ligaments involved in the metacarpophalangeal joints

Answer 23

1. Palmar L
2. Medial collateral L
3. Lateral collateral L
4. Deep transverse metacarpal L

Question 24

Palmar L of metacarpophalangeal joints

Answer 24

Thickened anterior aspect of articular capsule

Question 25

Medial and latera collateral L’s of metacarpophalangeal joints

Answer 25

Medial: medial side of joints, has a cord shaped part + fan shaped part Lateral: lateral side of joint; has a cord shaped part and fan shaped part

Question 26

Deep transverse metacarpal L

Answer 26

Transverse fibers join palmar L of medial four metacarpophalangeal joints

Question 27

Bull Rider’s Thumb

Answer 27

Sprain of LCL and possible avulsion of lateral proximal phalanx of the thumb, common in people who ride mechanical bulls

Question 28

Skier’s thumb or game-keeper’s thumb

Answer 28

Laxity/rupture of both collateral ligaments of 1st metacarpophalangeal joint -> hyperabduction

Question 29

Interphalangeal joint type (PIPs and DIPs)

Answer 29

Ginglymus synovial joints

Question 30

Three ligaments that play roles in PIPs and DIPs

Answer 30

1. Palmar L 2. Medial collateral L 3. Lateral collateral L

Question 31

Mallet finger, baseball finger

Answer 31

Caused by sudden hyperflexion of DIP -> avulsion of long extensor tendon