metocarpophalangeal joints

Question 1

classification

Answer 1

synovial condyloid joints

Question 2

axis of movement

Answer 2

2 - transverse and AP

Question 3

articular surfaces

Answer 3

head of MC
base of proximal phalanx

Question 4

features of head of MC

Answer 4

convex
covered in hyaline cartilage

Question 5

features of base of phalanx

Answer 5

concave
covered in hyaline cartilage

Question 6

3 features of capsule

Answer 6

loose fibrous capsule
attached to articular margins
strengthened laterally by collateral ligaments

Question 7

ligaments

Answer 7

palmar
collateral
deep transverse metacarpal

Question 8

palmar ligament - features and function

Answer 8

fibrocartilaginous plate
increases surface area of proximal phalanx
limits extension

Question 9

collateral ligament - where and function

Answer 9

sides of MC head to palmar side base of proximal phalanx
stabilises joint (tension increases during flexion)

Question 10

deep transverse metacarpal ligament - where and function

Answer 10

connects 4 palmar ligaments of 2nd to 5th MCP joints
acting to bind heads of MCPs together
limits abduction

Question 11

flexion

Answer 11

> 90, increases towards little finger

Question 12

extension

Answer 12

up to 50

Question 13

abduction/adduction

Answer 13

30 (when MCPs in extension)