Wrist Ligaments and Muscles

Question 1

Palmar radiocarpal ligament

Attachments and Function

Answer 1

Attaches from the radius to both rows of carpal bones

It increases stability, and ensures that the hand follows the forearm during supination.

Question 2

Dorsal radiocarpal ligament

Attachments and Function

Answer 2

Attaches from the radius to both rows of carpal bones.

It contributes to the stability of the wrist, but also ensures that the hand follows the forearm during pronation.

Question 3

Ulnar collateral ligament

Attachments and Function

Answer 3

Attaches from the ulnar styloid process to the triquetrum and pisiform.
It works in union with the other collateral ligament to prevent excessive lateral joint displacement.

Question 4

Radial collateral ligament

Attachments and Function

Answer 4

Attaches from the radial styloid process to the scaphoid and trapezium.
It works in union with the other collateral ligament to prevent excessive lateral joint displacement.

Question 5

Flexors

Answer 5

Flexor carpi radialis
Flexor carpi ulnaris
Palmaris longus

Question 6

Flexor carpi radialis

Attachments

Answer 6

Medial epicondyle (via common flexor tendon) to front base of second and third metacarpals

Question 7

Flexor carpi ulnaris

Attachments

Answer 7

Humeral head: medial epicondyle (via common flexor tendon)
Ulnar head: medial border of olecranon and upper two thirds of border of ulna
to pisiform, hook of hamate and base of fifth metacarpal

Question 8

Palmaris longus

Attachments

Answer 8

Medial epicondyle (via common flexor tendon) to flexor retinaculum, palmar aponeurosis

Question 9

Extensors

Answer 9

Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor carpi ulnaris

Question 10

Extensor carpi radialis longus

Attachments

Answer 10

Lower third of lateral supracondylar ridge of humerus to posterior base of second metacarpal

Question 11

Extensor carpi radialis brevis

Attachments

Answer 11

Lateral epicondyle (via common extensor tendon) to posterior base of third metacarpal

Question 12

Extensor carpi ulnaris

Attachments

Answer 12

Lateral epicondyle (via common extensor tendon) to medial side of fifth metacarpal base

Question 13

Intrinsic Flexors

Answer 13

Flexor digitorum superficialis
Flexor digitorum profundus
Flexor pollicis longus

Question 14

Intrinsic extensors

Answer 14

Extensor digitorum
Extensor indicis
Extensor digiti minimi
Extensor pollicis longus
Extensor pollicis brevis

Question 15

Nerve Supply

Answer 15

Median, ulnar and radial

Question 16

Capsular Pattern

Answer 16

Flexion

Extension