MUSCLES OF PECTORAL GIRDLE AND UPPER LIMBS

Question 1

muscles that move the arm

Answer 1

deltoid
pectoralis major
latissimus doris

Question 2

deltoid function

Answer 2

abduction at shoulder

Question 3

deltoid origin and insertion

Answer 3

O: clavicle + scapula
I: deltoid tuberosity of humerus

Question 4

pectoralis major function

Answer 4

flexion at shoulder

Question 5

pectoralis major origin and insertion

Answer 5

Origin: cartilages of ribs 2-6

Insertion: crest of greater tubercle

Question 6

latissimus dorsi function

Answer 6

extension at shoulder

Question 7

latissimus dorsi origin and insertion

Answer 7

• Origin: the spinous process of inferior thoracic and all lumbar vertebrae
• insertion: the floor of the intertubercular groove of the humerus

Question 8

muscles that position the pectoral girdle

Answer 8

serratus anterior
trapezius

Question 9

serratus anterior function

Answer 9

protracts shoulder

Question 10

serratus anterior origin and insertion

Answer 10

O: anterior margins of ribs 1-8

I: anterior surface of vertebral border of scapula

Question 11

trapezius function

Answer 11

elevate or depress scapula

Question 12

trapezius origin and insertion

Answer 12

Origin: occipital bone

Insertion: clavicle and scapula

Question 13

muscles that are flexors at the elbow

Answer 13

biceps brachii
brachialis
brachioradialis

Question 14

biceps brachii function

Answer 14

flexion at elbow

Question 15

biceps brachii origin and insertion

Answer 15

Origin: short head from the coracoid process

-Insertion: radial tuberosity

Question 16

brachialis function

Answer 16

flexion at elbow

Question 17

brachialis origin and insertion

Answer 17

• origin: anterior distal; surface of humerus
• insertion: ulnar tuberosity

Question 18

brachioradialis function

Answer 18

flexion at elbow

Question 19

brachioradialis origin and insertion

Answer 19

• Origin: ridge superior to the lateral epicondyle of humerus

-Insertion: lateral aspect of the styloid process of the radius

Question 20

extensors of the elbow

Answer 20

triceps brachii

Question 21

triceps brachii

Question 22

flexors at the hand

Answer 22

flexor carpi radialis

flexor carpi ulnaris

Question 23

flexor carpi ulnaris function

Answer 23

flexion at wrist

Question 24

flexor carpi ulnaris origin and insertion

Answer 24

Origin: medial epicondyle of humerus

Insertion: pisiform

Question 25

flexor carpi radialis function

Answer 25

flexion at wrist

Question 26

flexor carpi radialis origin and insertion

Answer 26

-Origin: medial epicondyle of humerus

-Insertion: bases of 2nd and 3rd metacarpal bones

Question 27

flexor digitorum superficialis

Answer 27

flexion at wrist joints

• O: medial epicondyle of humerus

I: mid-lateral surfaces of middle phalanges of fingers 2-5

Question 28

flexor digitorum profundus

Answer 28

flexion at wrist joints

O: medial surfaces of ulna

I: Bases of distal phalanges 2-5

Question 29

extensor digitorum

Answer 29

extension at finger joints

O: lateral epicondyle of humerus

I: posterior surfaces of the phalanges