Forearm and Hand Part 2

Question 1

Flexor Carpi Radius Action

Answer 1

Flex the wrist
Abduct the wrist
May assist to flex the elbow

Question 2

Flexor Carpi Radialis Origin

Answer 2

Common flexor tendon from medial epicondyle of the humerus

Question 3

Flexor Carpi Radialis Insertion

Answer 3

Base of the second and third metacarpal

Question 4

Palmaris Longus Action

Answer 4

Tense the palmar fascia
Flex the wrist
May assist to flex the elbow

Question 5

Palmaris Longus Origin

Answer 5

Common flexor tendon from medial epicondyle of the humerus

Question 6

Palmaris Longus Insertion

Answer 6

Flexor retinaculum and palmar aponeurosis

Question 7

Flexor Carpi Ulnaris Action

Answer 7

Flex the wrist
Adduct the wrist
Assist to flex the elbow

Question 8

Flexor Carpi Ulnaris Origin: Humeral and Ulnar head

Answer 8

Humeral head:
Common flexor tendon from medial epicondyle of the humerus
Ulnar head:
Posterior surface of proximal two thirds of the ulna

Question 9

Flexor Carpi Ulnaris Insertion

Answer 9

Pisiform, hook of the hamate and base of the fifth metacarpal

Question 10

Flexor Digitorum Superficialis Action

Answer 10

Flex the second through fifth fingers
Flex the wrist

Question 11

Flexor Digitorum Superficialis Origin

Answer 11

Common flexor tendon from the medial epicondyle of humerus, ulnar collateral ligament, coronoid process of the ulna, interosseous membrane, and proximal shaft of the radius

Question 12

Flexor Digitorum Superficialis Insertion

Answer 12

Sides of middle phalanges of second through fifth finger

Question 13

Flexor Digitorum Profundus Action

Answer 13

Flex the second through fifth fingers

Question 14

Flexor Digitorum Profundus Origin

Answer 14

Anterior and medial surface of the proximal three quarters of the ulna

Question 15

Flexor Digitorum Profundus Insertion

Answer 15

Bases of distal phalanges, palmar surface of second through fifth fingers

Question 16

Pronator Teres Action

Answer 16

Pronate the forearm
Assist to flex the elbow

Question 17

Pronator Teres Origin

Answer 17

Common flexor tendon from medial epicondyle of the humerus and coronoid process of the ulna

Question 18

Pronator Teres Insertion

Answer 18

Middle of lateral surface of the radius

Question 19

Pronator Quadratus Action

Answer 19

Pronate the forearm

Question 20

Pronator Quadratus Origin

Answer 20

Medial, anterior surface of the distal ulna

Question 21

Pronator Quadratus Insertion

Answer 21

Lateral, anterior surface of distal radius

Question 22

Supinator Action

Answer 22

Supinate the forearm

Question 23

Supinator Origin

Answer 23

Lateral epicondyle of the humerus, radial collateral ligament, annular ligament and supinator crest of the ulna

Question 24

Supinator Insertion

Answer 24

Anterior, lateral surface of proximal one third of the radial shaft

Question 25

Which muscle is absent in 11% of the population?

Answer 25

Palmaris longus

Question 26

Which muscle is always present even in the absence of others?

Answer 26

Palmar aponeurosis

Question 27

Which muscles may be doubled?

Answer 27

Palmaris longus (also different insertions)

Question 28

Which motion is primary, supination or pronation?

Answer 28

Supination from bicep strenght