Flexors of Wrist and Digits

Question 1

What is the wrist joint?
type
bones involved
movements

Answer 1

Type: Synovial joint
Bones involved: Distal radius, ulna, scaphoid, lunate, triquetrum
Movements: Flexion, abduction, adduction

Question 2

What are the carpometacarpal joints (CMC)?
number
location
movements of CMC I & CMC II-IV

Answer 2

Number: 5 joints (I-V)
Location: Between distal carpal bones and metacarpals
Movements:
CMC I: Flexion, extension, abduction, adduction, rotation, circumduction
CMC II-V: Gliding

Question 3

What are the metacarpophalangeal joints (MCP)?
location
movements

Answer 3

Location: Between metacarpal distal heads and proximal phalanges (digits I-V)
Movements: Flexion, extension, abduction, adduction, circumduction, limited rotation

Question 4

What are the interphalangeal joints (IP)?
type
movements

Answer 4

Type: Hinge joints between phalanges
Movements: Flexion, extension

Question 5

What are the layers of forearm flexor muscles?
superficial layer
intermediate layer
deep layer

Answer 5

1. Superficial layer:
   Flexor carpi ulnaris
   Palmaris longus
   Flexor carpi radialis
2. Intermediate layer:
   Flexor digitorum superficialis
3. Deep layer:
   Flexor digitorum profundus

Question 6

What are the actions of forearm flexor muscles?

Answer 6

Flexion of hand and fingers
Pronation of hand
Movement of wrist joint

Question 7

What is the action of flexor muscles on the digits I-V?

Answer 7

Thumb (Digit I): Flexion at MCP and IP joints
Digits II-V: Flexion at MCP and IP joints