Wrist and Hand Complex Ligaments

Question 1

Ulnar Collateral Ligament of the Elbow

Answer 1

Function: resists excessive cubital valgus
Attachment: medial epicondyle to the medial margin of the coronoid process and olecranon process

Question 2

Radial Collateral Ligament of the Elbow

Answer 2

Function: resist excessive cubial varus
attachment: lateral epicondyle to the annular ligament

Question 3

Annular Ligament

Answer 3

Function: stabilize the proximal radioulnar joint
Attachment: from the anterior margin of the radial notch to the posterior margin of the radial notch surrounding the head of the humerus

Question 4

Interosseous Membrane of the forearm

Answer 4

attachment: from the interosseous border of radius to interosseous border of the ulna

Question 5

Transverse Carpal Lig

Answer 5

function: prevents bowstringing of the tendons of the flexor pollicis longus, flexor digitorum superficialis and profundus muscles
Attachment: from the pisiform & hook of the hamate to the scaphoid and trapezium

Question 6

Radiocarpal ligament of the wrist

Answer 6

Function: stabilizes carpal bones on the radius
attachment: 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
attachment: radial styloid process to scaphoid

Question 8

Ulnar Collateral Ligament of the wrist

Answer 8

Function: restrain/limit wrist radial deviation
Attachment: ulnar styloid process to triquetrum

Question 9

Collateral ligaments of the metacarpophalangeal joints

Answer 9

Function: stabilizes metacarpophalangeal joints
attachment: from the head of the metacarpals to base of adjacent proximal phalanx

Question 10

Triangulo fibrocartilage complex

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: 
1. Biconcave fibrocartilage disc 
2. Palmar ulnocarpal lig
3. Ulnar collateral lig