Muscles of the Upper Extremities

Question 1

Insertion of Deltoid

Answer 1

Humerus

Question 2

Action of Deltoid

Answer 2

Abducts arm and flexes and extends shoulders

Question 3

Origin of Biceps brachii

Answer 3

Short head - Coracoid process of scapula

Long head - head of humerus

Question 4

Insertion of Biceps brachii

Answer 4

Proximal radius

Question 5

Action of Biceps brachii

Answer 5

Flexes elbow and supinates arm

Question 6

Origin of Brachialis

Answer 6

Humerus

Question 7

Insertion of Brachialis

Answer 7

Coronoid process of ulna

Question 8

Action of Brachialis

Answer 8

Flexes arm

Question 9

Origin of Brachioradialis

Answer 9

Humerus

Question 10

Insertion of Brachioradialis

Answer 10

Styloid process of radius

Question 11

Action of Brachioradialis

Answer 11

Flexes forearm (synergist of brachialis)

Question 12

Origin of Pronator teres

Answer 12

Humerus and coronoid process of ulna

Question 13

Insertion of Pronator teres

Answer 13

Radius

Question 14

Action of Pronator teres

Answer 14

Pronates forearm

Question 15

Origin of Flexor carpi radialis

Answer 15

Humerus (medial epicondyle)

Question 16

Insertion of Flexor carpi radialis

Answer 16

2nd and 3rd metacarpals

Question 17

Action of Flexor carpi radialis

Answer 17

Flexes the wrist and abducts hand

Question 18

Origin of Palmaris longus

Answer 18

Humerus (medial epicondyle)

Question 19

Insertion of Palmaris longus

Answer 19

Flexor retinaculum and palmar aponeurosis

Question 20

Action of Palmaris longus

Answer 20

Weakly flexes hand and wrist joint

Question 21

Origin of Flexor carpi ulnaris

Answer 21

Humerus (medial epicondyle) and ulna

Question 22

Insertion of Flexor carpi ulnaris

Answer 22

Pisiform, hamate and base of 5th metacarpal

Question 23

Action of Flexor carpi ulnaris

Answer 23

Flexes and adducts hand at wrist joint

Question 24

Origin of Extensor carpi radialislongus

Answer 24

Humerus

Question 25

Insertion of Extensor carpi radialislongus

Answer 25

2nd and 3rd metacarpals

Question 26

Action of Extensor carpi radialislongus

Answer 26

Extends and abducts wrist

Question 27

Origin of Extensor digitorum

Answer 27

Humerus (lateral epicondyle)

Question 28

Insertion of Extensor digitorum

Answer 28

Distal phalanges of 2nd and 5th digits

Question 29

Action of Extensor digitorum

Answer 29

Extends finger, and flares or adducts fingers

Question 30

Origin of Extensor carpi ulnaris

Answer 30

Humerus (lateral epicondyle)

Question 31

Insertion of Extensor carpi ulnaris

Answer 31

5th metacarpal

Question 32

Action of Extensor carpi ulnaris

Answer 32

Extends and adducts wrist

Question 33

Origin of Deltoid

Answer 33

Scapula, clavicle

Question 34

Origin of Triceps brachii

Answer 34

Long head - lateral border of scapula Lateral head - lateral and posterior surface of humerus Medial head - posterior of humerus

Question 35

Insertion of Triceps brachii

Answer 35

Olecranon process of ulna

Question 36

Action of Triceps brachii

Answer 36

Extends elbow; extends shoulder; adduct arms