Anterior Forearm

Question 1

What functions do the muscles of the anterior forearm have?

Answer 1

Flexors of the wrists and digits Pronators of the forearm

Question 2

Into what groups are the muscles of the anterior forearm split?

Answer 2

Superficial, intermediate and deep groups

Question 3

What muscles are in the superficial group of the anterior forearm?

Answer 3

Pronator teres Flexor carpi radialis Palmaris longus Flexor carpi ulnaris

Question 4

Where do the muscles of the superficial group of the anterior forearm attach proximally?

Answer 4

Attached by the common flexor tendon to the medial epicondyle of the humerus

Question 5

Identify the structures labelled 1-4

Answer 5

1- Flexor carpi radialis 2- Palmaris longus 3- Flexor carpi ulnaris 4- Pronator teres

Question 6

What is the action of pronator teres?

Answer 6

Pronate and flex the forearm

Question 7

What is the innervation of pronator teres?

Answer 7

Median nerve

Question 8

What is the common action of flexor carpi radialis, palmaris longus and flexor carpi ulnaris?

Answer 8

Flex the hand at the wrist joint

Question 9

What are the functions of flexor carpi ulnaris?

Answer 9

Flex hand at wrist joint Adduction of the wrist joint

Question 10

What are the functions of flexor carpi radialis?

Answer 10

Flex hand at wrist joint Abduction of the wrist joint

Question 11

What is the innervation of the superificial muscles of the forearm?

Answer 11

Flexor carpi radialis, palmaris longus and pronator teres- median nerve Flexor carpi ulnaris- ulnar nerve

Question 12

What is the action of brachioradialis?

Answer 12

Weak flexion of the elbow joint

Question 13

What is the innervation of brachioradialis?

Answer 13

Radial nerve

Question 14

Why can brachioradialis be considered a paradoxial muscle?

Answer 14

It’s location and innervation are usual of an extensor muscle but it is actually a flexor

Question 15

Which muscle is present in the intermediate compartment of the anterior forearm?

Answer 15

Flexor digitorum superficialis

Question 16

How many tendons does flexor digitorum superficialis give rise to and what does each attach to?

Answer 16

Four- one to each of the medial four digits

Question 17

On which phalanx are the tendons of the flexor digitorum superficialis inserted?

Answer 17

The middle phalanx of each of the medial four digits

Question 18

What is the action of flexor digitorum superficialis?

Answer 18

Flex the wrist, metacarpophalangeal and interphalangeal joints No action on the distal interphalangeal joints

Question 19

What is the innervation of flexor digitorum superficialis?

Answer 19

Median nerve

Question 20

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

Answer 20

Flexor digitorum profundus Flexor pollicis longus Pronator quadratus

Question 21

The deep group of muscles of the anterior forearm lie in close relation to the bones and interosseus membranes. To which bone does each of the muscles lie in close relation?

Answer 21

Flexor digitorum profundus- ulna Flexor pollicis longus- radius Pronator quadratus- distal part of both radius and ulna

Question 22

Where does the flexor digitorum profundus lie?

Answer 22

Deep in the front of the forerarm Lies more superficially on the medial border and back of forearm

Question 23

What are the actions of flexor digitorum profundus?

Answer 23

Only flexors of distal interphalangeal joints Also flexes metacarpophalangeal joints and the wrist

Question 24

What is the innervation of flexor digitorum profundus?

Answer 24

Medial part of FDP innervated by ulnar nerve Lateral part of FDP innervated by median nerve

Question 25

What are the actions of flexor pollicis longus?

Answer 25

Flexes the interphalangeal and metacarpophalangeal joints of the thumb

Question 26

What is the innervation of flexor pollicis longus?

Answer 26

Anterior interosseus branch of median nerve

Question 27

What is the course of pronator quadratus?

Answer 27

Lies deeply in the distal fourth of the forearm taking origin from the ulna Passes across to be inserted into the radius

Question 28

What is the action of pronator quadratus?

Answer 28

Pronates forearm

Question 29

What is the innervation of pronator quadratus?

Answer 29

Anterior interosseus branch of median nerve