Volar Forearm And Wrist

Question 0

What is the only muscle of the forearm that inserts into fascia?

Answer 0

Palmaris longus

Question 1

What fills in the gap between the distal radius and hand bones?

Answer 1

TFCC

Question 2

What are the 4 superficial muscles of the volar forearm?

Answer 2

Pronator teres
FCR
Palmaris longus
FCU
*held together by common flexor tendon (originates at medial epicondyle

Question 3

What is the intermediate muscle of the volar forearm?

Answer 3

Flexor digitorum superficialis

Flexes mid carpal of 4 fingers

Question 4

What are the 3 deep muscles of the volar forearm?

Answer 4

Flexor digitorum profundus–allows flexion of all carpal joints
Flexor pollicis longus–flexes tip of thumb
Pronator quadratus

Question 5

What makes up the carpal tunnel?

Answer 5

9 tendons of extrinsic flexors
- 1 FPL, 4 FDP, 4 FDS
1 nerve
- median nerve (most superficial structure)

Question 6

What are the symptoms of carpal tunnel and why?

Answer 6

Pain, numbness, and tingly in thumb, index, middle, and 1/2’of ring finger

–cutaneous distribution of median nerve

Question 7

What is the ceiling of the carpal tunnel?

Answer 7

Flexor retinaculum

Question 8

What is Colles fracture and how is it caused?

Answer 8

Fracture of distal radius with posterior displacement of a fragment

Falling on an outstretched hand

Question 9

Why is a fractured scaphoid often overlooked at first?

Answer 9

It does not get good blood supply, so it doesn’t show up on an x-Ray

Question 10

When does the pronator quadratus need assistance from the pronator teres?

Answer 10

When more speed and power is needed

Question 11

When are the long digit flexors (FDP and FDS) most efficient and why?

Answer 11

When wrist is extended–increases operating distance