Superficial Muscles

Question 1

What is the origin of the Extensor Carpi Radialis Longus?

Answer 1

Lateral supracondylar ridge of the humerus.

Question 2

Which muscle inserts at the base of the second metacarpal?

Answer 2

Extensor Carpi Radialis Longus.

Question 3

True or False: The Extensor Carpi Radialis Brevis originates from the lateral epicondyle of the humerus.

Answer 3

True.

Question 4

What nerve supplies the Extensor Carpi Radialis Brevis?

Answer 4

Radial nerve.

Question 5

What action is performed by the Extensor Carpi Radialis Brevis?

Answer 5

Extension and abduction of the wrist.

Question 6

Fill in the blank: The Extensor Digitorum originates from the _____ epicondyle of the humerus.

Answer 6

lateral.

Question 7

Which muscle allows for extension of the fingers?

Answer 7

Extensor Digitorum.

Question 8

What is the insertion point of the Extensor Digitorum?

Answer 8

Extensor expansions of digits 2 to 5.

Question 9

What is the primary nerve supply to the Extensor Digitorum?

Answer 9

Radial nerve.

Question 10

What action does the Extensor Digiti Minimi perform?

Answer 10

Extension of the little finger.

Question 11

True or False: The Extensor Carpi Ulnaris originates from the medial epicondyle of the humerus.

Answer 11

False.

Question 12

Where does the Extensor Carpi Ulnaris insert?

Answer 12

Base of the fifth metacarpal.

Question 13

Which nerve supplies the Extensor Carpi Ulnaris?

Answer 13

Radial nerve : posterior interosseuos nerve

Question 14

What is the action of the Extensor Carpi Ulnaris?

Answer 14

Extension and adduction of the wrist.

Question 15

What is the origin of the Supinator muscle?

Answer 15

Lateral epicondyle of the humerus and supinator crest of the ulna.

Question 16

The Supinator muscle is innervated by which nerve?

Answer 16

Radial nerve.

Question 17

What action does the Supinator perform?

Answer 17

Supination of the forearm.

Question 18

Which muscle assists in the extension of the thumb?

Answer 18

Abductor Pollicis Longus.

Question 19

What is the origin of the Abductor Pollicis Longus?

Answer 19

Posterior surface of the radius and ulna, and interosseous membrane.

Question 20

Where does the Abductor Pollicis Longus insert?

Answer 20

Base of the first metacarpal.

Question 21

What is the nerve supply to the Abductor Pollicis Longus?

Answer 21

Radial nerve.

Question 22

What action does the Abductor Pollicis Longus perform?

Answer 22

Abduction and extension of the thumb.

Question 23

What is the origin of the Extensor carpi radialis Brevis?

Answer 23

By a common tendon from lateral epicondyle of humerus and literally ligament of elbow joint

Question 24

Which muscle inserts at the base of the proximal phalanx of the thumb?

Answer 24

Extensor Pollicis Brevis.

Question 25

True or False: The Extensor Pollicis Longus is responsible for extending the thumb at the interphalangeal joint.

Answer 25

True.

Question 26

What is the action of the Extensor Pollicis Longus?

Answer 26

Extension of the thumb at all joints.

Question 27

What is the nerve supply to the Extensor Pollicis Longus?

Answer 27

Radial nerve.