Wrist & Forearm

Question 1

List the carpel bones.

Answer 1

Distal Row
Hamate - capitate - trapezoid - trapezium
Proximal Row
Pisiform - Triquetrum - Lunate - scaphoid

Question 2

Describe the wrist joint.

Answer 2

Synovial
Two rows of carpal bones. (proximal & distal)
Connected to radius & ulna, articulation of the wrist occurs only between the radius and carpal bones.

Question 3

State the two retinaculums of the wrist

Answer 3

Extensor & Flexor

Question 4

Describe the function of the wrist ligaments.

Answer 4

Strongest on front,.
Link radius & Ulna
link carpal bones to radius and ulna
Link carpal bones to each other.

Question 5

List the motions of the wrist and forearm.

Answer 5

Flexion & Extension
Radial deviation & Ulnar deviation
Pronation and Supination

Question 6

Describe Pronator Teres.

Answer 6

Origin: Medial epicondyle (humerus) & coronoid process (Ulna)
Insertion: Middle of lateral radius.
Action: Pronation
Nerve Supply: Median

Question 7

Describe pronator quadratus.

Answer 7

Origin: Distal, anterior ulna
Insertion: Distal anterior radius
Action: Pronation
Nerve Supply: Median

Question 8

Describe the supinator muscle.

Answer 8

Origin: Lateral epicondyle (humerus), radial collateral & annular ligaments (radius)
Insertion: Lateral, posterior & anterior proximal radius.
Action: Supination
Nerve Supply: Radial

Question 9

Describe Flexor carpi ulnaris.

Answer 9

Origin: Medial epicondyle, humerus
Insertion: Pisiform, Hamate, base 5th metacarpal.
Action: Wrist Flexion
Nerve Supply: Ulnar

Question 10

Describe Flexor carpi radialis.

Answer 10

Origin: Medial epicondyle, humerus.
Insertion: Base of 2nd and 3rd metacarpal.
Action: Wrist Flexion
Nerve Supply: Median

Question 11

Describe Flexor digitorum longus.

Answer 11

Origin: Medial epicondyle, humerus adj, Ulnar, radius.
Insertion: Middle phalanges, digits 2 - 5
Action: Finger Flexion.
Nerve Supply: Median.

Question 12

Describe Flexor digitorum profundus.

Answer 12

Origin: Anterior Ulna, interosseus membrane
Insertion: Distal phalanges, digits, 2 - 5
Action: Finger Flexion
Nerve Supply: Median & Ulnar.

Question 13

Describe Flexor pollicis Longus

Answer 13

Origin: Anterior Radius, interosseus membrane
Insertion: Distal phalanx Thumb (Pollux)
Action: Flexion of thumb.
Nerve Supply: Median

Question 14

Describe extensor carpi radialis longus.

Answer 14

Origin: Lateral epicondyle, humerus.
Insertion: Base of 2nd metacarpal
Action: Wist extension
Nerve Supply: Radial

Question 15

Describe extensor carpi radialas brevis.

Answer 15

Origin: Lateral epicondyle, Humerus.
Insertion: Base of 3rd metacarpal
Action: Wrist Extension
Nerve Supply: Radial.

Question 16

Describe extensor carpi ulnaris.

Answer 16

Origin: lateral epicondyle, humerus.
Insertion: Base of 5th metacarpal
Action: Wrist extension.
Nerve Supply: radial

Question 17

Describe Extensor digitorum.

Answer 17

Origin: Lateral epicondyle, humerus.
Insertion: Extensor expansions, four fingers.
Action: Finger extension.
Nerve Supply: Radial.

Question 18

Describe Abductor pollicis longus.

Answer 18

Origin: Dorsal ulna and radius.
Insertion: Lateral border, 1st metacarpal
Action: Abduct Pollux
Nerve Supply: Radial

Question 19

Describe Extensor pollicis brevis.

Answer 19

Origin: Shaft of radius
Insertion: Proximal phalanx of thumb
Action: Extend pollux
Nerve Supply: Radial

Question 20

Describe extensor pollicis longus.

Answer 20

Origin: Dorsal and lateral ulna
Insertion: lateral border, distal phalanx of thumb.
Action: Extend pollux
Nerve Supply: Radial