MSK 3b: anterior forearm

Question 1

Superficial muscles of anterior forearm from lateral to medial?

Answer 1

Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris

Question 2

Pronator teres origin?

Answer 2

Medial epicondyle of humerus and coronoid process of ulna

Question 3

Pronator teres insertion?

Answer 3

Lateral side of the mid-shaft of the radius

Question 4

Pronator teres innervation?

Answer 4

Median C6,C7

Question 5

Pronator teres action?

Answer 5

Forearm pronation

Question 6

Flexor carpi radialis origin?

Answer 6

Medial epicondyle of humerus

Question 7

Flexor carpi radialis insertion?

Answer 7

Base of 2nd and 3rd metacarpals

Question 8

Flexor carpi radialis innervation?

Answer 8

Median C6, C7

Question 9

Flexor carpi radialis action:

Answer 9

Flexion and ABduction at wrist

Question 10

Palmaris longus origin?

Answer 10

Medial epicondyle of humerus

Question 11

Palmaris longus insertion?

Answer 11

Flexor retinaculum

Question 12

Palmaris longus innervation?

Answer 12

Median C7,C8

Question 13

Palmaris longus action?

Answer 13

Flexes at wrist

Absent in 15%

Question 14

Flexor carpi ulnaris origin?

Answer 14

Medial epicondyle of humerus

Question 15

Flexor carpi ulnaris insertion?

Answer 15

Pisiform

Question 16

Flexor carpi ulnaris innervation?

Answer 16

Ulnar C7 C8

Question 17

Flexor carpi ulnaris action?

Answer 17

Flexion and ADduction of wrist

Question 18

Flexor digitorum superficialis (intermediate layer) origin

Answer 18

Medial epicondyle of humerus
Radial head-superior half of anterior border

Median nerve and ulnar artery pass between its two heads then go posteriorly

Question 19

Flexor digitorum superficialis (intermediate layer) insertion

Answer 19

Shafts of the middle phalanges of the medial 4 digits (splits into 4 tendons @ wrist and travels through carpal tunnel)

Question 20

Flexor digitorum superficialis (intermediate layer) innervation

Answer 20

Median nerve C7,C8,T1

Question 21

Flexor digitorum superficialis (intermediate layer) action

Answer 21

Flexes MCP joints and proximal IP joints

Question 22

Flexor digitorum profundus origin

Answer 22

Ulna (proximal 3/4) and interosseous membrane

Question 23

Flexor digitorum profundus insertion

Answer 23

Distal phalanges of the 4 digits (splits into 4 tendons in carpal tunnel)

Question 24

Flexor digitorum profundus innervation

Answer 24

Medial half (little and ring) ulnar (C8,T1)
Lateral half (middle and index) median (C8,T1-anterior interosseous branch)

Question 25

Flexor digitorum profundus action

Answer 25

Flexes distal IP joints

Question 26

Flexor pollicis longus origin

Answer 26

Anterior radius and interosseous membrane

Question 27

Flexor pollicis longus insertion

Answer 27

Base of distal phlaynx of thumb

Question 28

Flexor pollicis longus innervation

Answer 28

Median nerve anterior interosseous (C8,T1)

Question 29

Flexor pollicis longus action

Answer 29

Flexes phalanges of thumb

Question 30

Pronator quadratus origin

Answer 30

Anterior distal 1/4 of ulna

Question 31

Pronator quadratus insertion

Answer 31

Distal 1/4 of anterior radius

Question 32

Pronator quadratus innervation

Answer 32

Median nerve anterior interosseous (C8,T1)

Question 33

Pronator quadratus action

Answer 33

Pronates forearm