Muscles of the forearm and wrist, hand

Question 1

What does the biceps brachii do?

Answer 1

Flex elbow, supinates forearm (feel it!)

Question 2

Where do the 2 heads of the biceps brachii originate?

Answer 2

Long head to the supraglenoid tubercle thru the bicipital groove; short head to the coracoid process of the scapula

Question 3

Where does the biceps brachii insert?

Answer 3

Inserts at radial tuberosity of radius

Question 4

What does the brachialis do?

Answer 4

Flexes elbow

Question 5

Where is the brachialis?

Answer 5

Humerus to coronoid process of the ulna

Question 6

What does the brachioradialis do?

Answer 6

Flexes elbow

Question 7

Where is the brachioradialis?

Answer 7

Humerus to styloid process of the radius

Question 8

What does the triceps brachii do?

Answer 8

Extend elbow

Question 9

Where is the triceps brachii?

Answer 9

Origin of the long head is the infraglenoid tubercle

Question 10

What does the supinator do?

Answer 10

Supinates forearm and hand

Question 11

What muscle is the antagonist of the supinator?

Answer 11

Pronator teres

Question 12

What muscles come off the coracoid process?

Answer 12

Biceps brachii; Pectoralis minor; coracobrachialis

Question 13

Which muscles extend the elbow?

Answer 13

Triceps brachii

Question 14

Which muscles flex the elbow?

Answer 14

Biceps brachii, brachialis, brachioradialis

Question 15

What are the two powerful wrist flexors?

Answer 15

flexor carpi radialis

flexor carpi ulnaris

Question 16

What is the weak wrist flexor?

Answer 16

Palmaris longus

Question 17

How the the flexor carpi radialis move?

Answer 17

Radial flexion and deviation of wrist → to thumb side

Question 18

How the the flexor carpi ulnaris move?

Answer 18

Ulnar flexion and deviation of wrist → to pinkie side

Question 19

Which muscle tenses the skin and fascia of the palm during hand movements?

Answer 19

Palmaris longus

Question 20

The palmaris longus is superficial to the _______ _______, and the ________ ______ is deep to the palmaris longus.

Answer 20

Flexor retinaculum

Median nerve

Question 21

The palmaris longus is medial to ________.

Answer 21

flexor carpi radialis

Question 22

What does the extensor carpi ulnaris do?

Answer 22

Extends wrist, ulnar deviation of wrist

Question 23

When and what does the extensor carpi ulnaris fix?

Answer 23

Fixes the wrist when the fist is clenched, eg a punch

Question 24

What extends the fingers?

Answer 24

extensor digitorum

Question 25

What extends wrist while extending fingers?

Answer 25

Extensor digitorum

Question 26

The extensor digitorum adducts or abducts the fingers?

Answer 26

Abducts

Question 27

Flexion occurs in the ________ forearm, while extension occurs in the ________ forearm.

Answer 27

Anterior

Posterior

Question 28

Which muscles flex in the forearm?

Answer 28

flexor carpi radialis, flexor carpi ulnaris, palmaris longus

Question 29

Which muscles extend in the forearm?

Answer 29

extensor carpi ulnaris, extensor digitorum