Unit 2 - Upper Limb: Joints of the Hand and Fingers (Ex. II)

Question 1

interphalangeal (IP) joints

Answer 1

hinge-type synovial joints
between phalanges:
- proximal interphalangeal (PIP) joints –> digits 2-5
- distal interphalangeal (DIP) joints –> digits 2-5
- thumb only has single IP joint
flexion-extension only

Question 2

What surrounds and supports MCP and IP joints?

Answer 2

fibrous capsule surrounds joints

M and L collateral ligaments support joints

Question 3

metacarpophalangeal (MCP) joints

Answer 3

condyloid synovial joints
heads of metacarpals –> bases of proximal phalanges
movement in 2 planes:
- flexion/extension –> all digits
- abduction/adduction –> digits 2-5 only