Muscles Of The Back Of The Forearm

Question 1

What is the primary function of extensor muscles?

Answer 1

To extend the joints they cross.

Question 2

Which muscle is considered a superficial extensor of the forearm?

Answer 2

Extensor carpi radialis longus.

Question 3

True or False: The extensor muscles are located on the anterior side of the forearm.

Answer 3

False.

Question 4

Fill in the blank: The deep extensor muscles include the _____ and the _____ muscles.

Answer 4

supinator; abductor pollicis longus.

Question 5

What is the origin of the extensor digitorum?

Answer 5

Lateral epicondyle of the humerus.

Question 6

Which nerve innervates the extensor muscles of the forearm?

Answer 6

Radial nerve.

Question 7

List two functions of the extensor carpi ulnaris.

Answer 7

Extends and adducts the wrist.

Question 8

What is the role of the abductor pollicis longus?

Answer 8

To abduct the thumb.

Question 9

Which muscle is responsible for extending the index finger?

Answer 9

Extensor indicis.

Question 10

True or False: The extensor pollicis brevis is a deep muscle.

Answer 10

True.

Question 11

What is the common origin point for most superficial extensor muscles?

Answer 11

Lateral epicondyle of the humerus.

Question 12

Identify one muscle that is part of the deep layer of extensor muscles.

Answer 12

Supinator.

Question 13

Multiple Choice: Which of the following muscles is NOT a superficial extensor? A) Extensor digitorum B) Extensor carpi radialis longus C) Flexor carpi ulnaris

Answer 13

C) Flexor carpi ulnaris.

Question 14

What is the main action of the extensor pollicis longus?

Answer 14

To extend the thumb.

Question 15

Fill in the blank: The extensor muscles are primarily located in the _____ compartment of the forearm.

Answer 15

posterior.

Question 16

What is the primary blood supply to the extensor muscles?

Answer 16

Radial and ulnar arteries.

Question 17

True or False: The extensor muscles are responsible for flexing the fingers.

Answer 17

False.

Question 18

What structure separates the superficial and deep layers of extensor muscles?

Answer 18

Intermuscular septum.

Question 19

Identify the muscle that extends the little finger.

Answer 19

Extensor digiti minimi.

Question 20

Multiple Choice: Which of the following is a function of the extensor carpi radialis brevis? A) Wrist flexion B) Wrist extension C) Finger adduction

Answer 20

B) Wrist extension.

Question 21

What is the insertion point for the extensor digitorum?

Answer 21

Extensor expansions of the fingers.

Question 22

Which muscle assists with supination of the forearm?

Answer 22

Supinator.

Question 23

True or False: The extensor muscles can aid in gripping activities.

Answer 23

True.

Question 24

What is the action of the extensor carpi radialis longus?

Answer 24

Extends and abducts the wrist.

Question 25

Which extensor muscle is responsible for extending the thumb at the carpometacarpal joint?

Answer 25

Abductor pollicis longus.

Question 26

Fill in the blank: The _____ nerve is responsible for the motor innervation of the extensor muscles.

Answer 26

Radial.

Question 27

What muscle is involved in extending the middle finger?

Answer 27

Extensor digitorum.

Question 28

Multiple Choice: Which extensor muscle is involved in extending the wrist? A) Extensor pollicis longus B) Extensor carpi radialis brevis C) Flexor carpi radialis

Answer 28

B) Extensor carpi radialis brevis.

Question 29

What is the function of the extensor retinaculum?

Answer 29

To stabilize the extensor tendons in the wrist.

Question 30

Identify one common injury related to the extensor muscles.

Answer 30

Tennis elbow (lateral epicondylitis).

Question 31

True or False: The deep extensor muscles are more superficial than the superficial extensor muscles.

Answer 31

False.

Question 32

What is the primary action of the extensor carpi ulnaris?

Answer 32

Extends and adducts the wrist.