Anterior Muscles of Forearm

Question 1

What is the origin of the pronator teres?

Answer 1

Ulnar head originates on the coronoid process of the ulna

Humeral originates on the medial epicondyle of the humerus

Question 2

Where does the pronator teres insert?

Answer 2

Middle convexity of lateral surface of radius

Question 3

What is the innervation of the pronator teres?

Answer 3

Median nerve (C6, C7)

Question 4

What action does the pronator teres perform?

Answer 4

Pronates and flexes the forearm

Question 5

What is the origin of the flexor carpi radialis?

Answer 5

Medial epicondyle of humerus

Question 6

Where does the flexor carpi radialis insert?

Answer 6

Base of 2nd or 3rd metacarpal

Question 7

What is the innervation of the flexor carpi radialis?

Answer 7

Median nerve (C6, C7)

Question 8

What action does the flexor carpi radialis perform?

Answer 8

Flexes and abducts hand at wrist

Question 9

What is the origin of the palmaris longus?

Answer 9

Medial epicondyle of humerus

Question 10

Where does the palmaris longus insert?

Answer 10

Distal half of flexor retinaculum, palmar aponeurosis

Question 11

What is the innervation of the palmaris longus?

Answer 11

Median nerve (C7, C8)

Question 12

What action does the palmaris longus perform?

Answer 12

Flexes hand and tenses palmar aponeurosis

Question 13

What is the origin of the flexor carpi ulnaris?

Answer 13

Olecranon and posterior border of ulna via aponeurosis

Question 14

Where does the flexor carpi ulnaris insert?

Answer 14

Pisiform, hook of hamate, 5th metacarpal

Question 15

What is the innervation of the flexor carpi ulnaris?

Answer 15

Ulnar nerve (C7, C8)

Question 16

What is the origin of the flexor digitorum superficialis?

Answer 16

Humero-ulnar head originates on the medial epicondyle of humerus and coronoid process of ulna
Radial head originates on oblique line of radius

Question 17

Where does the flexor digitorum superficialis insert?

Answer 17

Bodies of middle phalanges of medial four digits

Question 18

What is the innervation of the flexor digitorum superficialis?

Answer 18

Median nerve (C7, C8, T1)

Question 19

What action does the flexor digitorum superficialis perform?

Answer 19

Flexes wrist joint and flexes proximal interphalangeal joints of middle four digits; more strongly flexes proximal phalanges at metacarpophalangeal joints

Question 20

What is the origin of the flexor digitorum profundus?

Answer 20

Proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane

Question 21

Where does the flexor digitorum profundus insert?

Answer 21

Bases of distal phalanges of 2nd, 3rd, 4th, and 5th digits

Question 22

What is the innervation of the flexor digitorum profundus?

Answer 22

Lateral part, to digits 2 and 3, is innervated by the median nerve (C8, T1)
Medial part, to digits 4 and 5, is innervated by the ulnar nerve (C8, T1)

Question 23

What action does the flexor digitorum profundus perform?

Answer 23

Flexes wrist joint and flexes distal interphalangeal joints of digits 2, 3, 4, and 5

Question 24

What is the origin of the flexor pollicis longs?

Answer 24

Anterior surface of radius and adjacent interosseous membrane

Question 25

Where does the flexor pollicis longus insert?

Answer 25

Base of distal phalanx of thumb

Question 26

What is the innervation of the flexor pollicis longs?

Answer 26

Anterior interosseous nerve from median nerve (C8, T1)

Question 27

What action does the flexor pollicis longus perform?

Answer 27

Flexes wrists and metacarpophalangeal and interphalangeal joints of thumb

Question 28

What is the origin of the pronator quadratus?

Answer 28

Distal quarter of anterior surface of ulna

Question 29

Where does the pronator quadratus insert?

Answer 29

Distal quarter of anterior surface of radius

Question 30

What is the innervation of the pronator quadratus?

Answer 30

Anterior interosseous nerve from median nerve (C8, T1)

Question 31

What action does the pronator quadratus perform?

Answer 31

Pronates forearm along with deep fibers binding radius and ulna together

Question 32

What action does the flexor carpi ulnaris perform?

Answer 32

Flexes and adducts hand at wrist

Question 33

What four muscles make up the superficial group of anterior forearm muscles?

Answer 33

Pronator teres, flexor carpi ulnaris, palmaris longus, and flexor carpi radialis

Question 34

What muscle makes up the intermediate group of anterior forearm muscles?

Answer 34

Flexor digitorum superficialis

Question 35

What muscles make up the deep group of anterior forearm muscles?

Answer 35

Flexor digitorum profundus, flexor pollicis longus, and pronator quadratus