Arthrology: Ligaments of Elbow, Wrist, & Hand

Question 1

Ulnar collateral

Answer 1

function- resists excessive cubital valgus

attachments- from medial epicondyle to medial margin of coronoid process & olecranon process

Question 2

Radial collateral

Answer 2

function- resists excessive cubital varus

attachments- from lateral epicondyle to annular ligament

Question 3

Annular

Answer 3

function- stabilizes proximal radioulnar joint

attachments- from the anterior margin of the radial notch to posterior margin of radial notch surrounding head of radius

Question 4

Interosseous membrane

Answer 4

attachments- from interosseous border of radius to interosseous border of ulna

Question 5

Transverse carpal

Answer 5

function- prevents bowstringing of the tendons of the flexor pollicis longus, flexor digitorum superficialis & flexor digitorum profundus muscles

attachments- from the pisiform & hook of the hamate to scaphoid & trapezium

Question 6

Radiocarpal ligaments

Answer 6

function – stabilizes carpal bones on the radius

attachments – dorsal and palmar surface of the distal radius to the first two rows of carpal bones

Question 7

Radial collateral ligament of the wrist

Answer 7

function – restrain/limit wrist ulnar deviation

attachments – radial styloid process to scaphoid

Question 8

Ulnar collateral ligament of the wrist

Answer 8

function – restrain/limit wrist radial deviation

attachments – ulnar styloid process to triquetrum

Question 9

Collateral ligaments of the metacarpophalangeal joints

Answer 9

function- stabilizes metacarpophalangeal joints

attachments- from the head of the metacarpals to base of adjacent proximal phalanx

Question 10

Triangular fibrocartilage complex (TFCC)

Answer 10

Function- Stabilize distal radio-ulnar and ulnocarpal joints, form concavity on the ulnar side of the wrist AND transfer compressive force from hand/wrist to the forearm.

Components-
Biconcave fibrocartilage disc
Palmar ulnocarpal ligament
Ulnar collateral ligament