Muscles of anterior compartment of forearm

Question 1

What is the proximal attachment of the pronator teres?

Answer 1

Ulnar head: coronoid process

Humeral head: Medial epicondyle of humerus

Question 2

What is the distal attachment of the pronator teres?

Answer 2

Middle of convexity of lateral surface of radius

Question 3

What nerve innervates the pronator teres?

Answer 3

Median nerve (C6,C7)

Question 4

What is the muscle action of the pronator teres?

Answer 4

Pronates and flexes forearm at elbow

Question 5

What is the proximal attachment of the flexor carpi radialis?

Answer 5

Medial epicondyle of humerus

Question 6

What is the distal attachment of the flexor carpi radialis?

Answer 6

Base of second metacarpal

Question 7

What nerve innervates the flexor carpi radialis?

Answer 7

Median nerve (C6,C7)

Question 8

What is the muscle action of the flexor carpi radialis?

Answer 8

Flexes and abducts hand (at wrist)

Question 9

What is the proximal attachment of the palmaris longus?

Answer 9

Medial epicondyle of humerus

Question 10

What is the distal attachment of the palmaris longus?

Answer 10

Distal half of flexor retinaculum and apex of palmar aponeurosis

Question 11

What nerve innervates the palmaris longus?

Answer 11

Median nerve (C7,C8)

Question 12

What is the muscle action of the palmaris longus?

Answer 12

Flexes hand (at wrist) and tenses palmar aponeuosis

Question 13

What is the proximal attachment of the flexor carpi ulnaris?

Answer 13

Humeral head: medial epicondyle of humerus

Ulnar head: Olecranon and posterior border of ulna

Question 14

What is distal attachment of the flexor carpi ulnaris?

Answer 14

Pisiform, hook of hamate, 5th metacarpal

Question 15

What nerve innervates the flexor carpi ulnaris muscle?

Answer 15

Ulnar nerve (C7,C8)

Question 16

What is the muscle action of the flexor carpi ulnaris?

Answer 16

Flexes and adducts hand (at wrist)

Question 17

What is the proximal attachment of the flexor digitorum superficialis?

Answer 17

Humero-ulnar head: medial epicondyle

Radial head: superior half of anterior border

Question 18

What is the distal attachment of the flexor digitorum superficialis?

Answer 18

Shafts of middle phalanges of medial four digits

Question 19

What nerve innervates the flexor digitorum superficialis muscle?

Answer 19

Median nerve (C7,C8,T1)

Question 20

What is the muscle action of the flexor digitorum superficialis?

Answer 20

Flexes middle phalanges at proximal interphalangeal joints, and flexes proximal phalanges at metacarpophalangeal joints

Question 21

What is the proximal attachment of the flexor digitorum profundus?

Answer 21

Medial and lateral part: meidal and anterior surfaces of ulna and interosseous membrane

Question 22

What is the distal attachment of the flexor digitorum profundus?

Answer 22

Medial part: bases of distal phalanges of 4th and 5th digits

lateral part: bases of distal phalanges of 2nd and 3rd digits

Question 23

What is the muscle action of the flexor digitorum profundus?

Answer 23

Medial part: flexes distal phalanges 4 and 5 at distal interphalageal joints
Lateral parts: flexes distal phalanges 2 and 3 at distal interphalangeal joints

Question 24

What is the proximal attachment of the flexor pollicis longus?

Answer 24

Anterior surface of radius and adjacent interosseous membrane

Question 25

What is the distal attachment of the flexor pollicis longus?

Answer 25

Base of distal phalanx of thumb

Question 26

What nerve innervates the flexor pollicis longus, pronator quadratus, and the flexor digitorum profundus?

Answer 26

Anterior interosseous nerve, from median nerve (C8,T1)

Question 27

What is the muscle action of the flexor pollicis longus?

Answer 27

Flexes phalanges of 1st digit (thumb)

Question 28

What is the proximal attachment of the pronator quadratus?

Answer 28

Distal quarter of anterior surface of ulna

Question 29

What is the distal attachmnet of the pronator quadratus?

Answer 29

Distal quarter of anterior surface of radius

Question 30

What is the muscle action of the pronator quadratus?

Answer 30

Pronates forearm; deep fibers bind radius and ulna together