hand

Question 1

capsular ligaments

Answer 1

• dorsal radiocarpal ligament
• palmar radiocarpal ligament
• palmar ulnocarpal ligament

Question 2

dorsal radiocarpal ligament

1) attachment
2) what action does it check

Answer 2

1) to posterior edge of lower end of radius to posterior surface of scaphoid, lunate and triquetral
2) checks flexion

Question 3

palmar radiocarpal ligament

1) attachment
2) what action does it check

Answer 3

1) fibres run inferiorly from anterior edge of radius and radial styloid to proximal row of carpus
2) extension

Question 4

palmar ulnocarpal ligament

1) attachment
2) what action does it check

Answer 4

1) fibres run inferiorly from ulna styloid and articular disc to the proximal row of carpals anteriorly
2) extension

Question 5

radial collateral carpal ligament

attachments

Answer 5

to radial styloid process to lateral side of scaphoid and trapezium

Question 6

ulna collateral carpal ligament

attachments

Answer 6

a rounded cord from the ulnar styloid to the base of pisiform and medial surface of triquetral.

• blends with carpal tunnel

Question 7

each joint of thumb has what ligaments for lateral stability

Answer 7

collateral ligaments that prevent lateral displacement

Question 8

what is the volar plate

Answer 8

a thick, rounded ligamentous structure on the palmar aspect of the joint preventing hyperextension.

Question 9

what is the triangular fibrocartilage complex

Answer 9

• multi faced complex on ulnar side of wrist
• between head of ulna and carpus
• acts as stabiliser for this side of the wrist and the distal radioulna joint.

Question 10

extrinsic ligaments

1) names of 2
2) function

Answer 10

1) volar and dorsal ligaments

2) bridge carpal bones to radius or metacarpals