action

Question 1

Frontal belly of occipitofrontalis

Answer 1

wrinkles forehead, elevates eyebrows, moves scalp

Question 2

Occipital belly of occipitofrontalis

Answer 2

moves the scalp posteriorly

Question 3

Orbicularis oris

Answer 3

closes lips, puckers lips

Question 4

Platysma

Answer 4

pulls lower lip inferiorly, tenses skin of neck, depression of mandible

Question 5

Buccinator

Answer 5

compresses cheek, holds food between teeth during chewing, sucking and blowing

Question 6

Sternocleidomastoid

Answer 6

both: head pulled forward and down; one: head turns sideways towards the opposite side

Question 7

Splenis capitus

Answer 7

both: pulls head back and extends the cervical vertebrae; one: turns head sideways toward the same side

Question 8

Semispinalis capitus

Answer 8

both: pulls head back and extends cervical vertebrae; one: turns head sideways toward same side

Question 9

Temporalis

Answer 9

elevates and retracts mandible

Question 10

Masseter

Answer 10

elevates and protracts mandible, prime mover of jaw closure

Question 11

Medial pterygoid

Answer 11

elevates and protracts mandible; side to side movement of mandible

Question 12

Lateral pterygoid

Answer 12

protracts mandble; side to side movement; depresses mandible to open mouth

Question 13

Serratus anterior

Answer 13

prime mover of scapula protraction, superiorly rotates scapula, stabilizes

Question 14

Pectoralis minor

Answer 14

protracts and depresses scapula

Question 15

Trapezius

Answer 15

superior fibers: elevate and superiorly rotate scapula; middle fibers: retract scapula; inferior fibers: depress scapula; also extends neck

Question 16

Rhomboid major

Answer 16

elevates and retracts (adducts) scapula, inferiorly rotates scapula

Question 17

Rhomboid minor

Answer 17

elevates and retracts (adducts) scapula, inferiorly rotates scapula

Question 18

Pectoralis major

Answer 18

prime mover of arm flexion; also adducts and medially rotates arm

Question 19

Latissimus dorsi

Answer 19

prime mover of arm extension and also adducts and medially rotates arm

Question 20

Deltoid

Answer 20

anterior fibers flex and medially rotate arm; middle fibers prime mover of arm abduction; poterior fibers extend and laterally rotate arm

Question 21

Coracobrachialis

Answer 21

adducts and flexes arm

Question 22

Teres major

Answer 22

prime mover of arm extension and also adducts and medially rotates arm

Question 23

Subscapularis

Answer 23

medially rotates arm, like winding up to pitch baseball

Question 24

Supraspinatus

Answer 24

abducts arm like when you start to execute a pitch of baseball

Question 25

Infraspinatus

Answer 25

adducts and laterally rotates the arm, like slowing down your arm after pitching a baseball

Question 26

Teres minor

Answer 26

adducts and laterally rotates arm like slowing down after pitching a baseball

Question 27

Biceps brachii

Answer 27

flexes forearm, powerful supinator of forearm

Question 28

Triceps brachii

Answer 28

primary extensor of elbow joint

Question 29

Brachialis

Answer 29

primary flexor of elbow joint

Question 30

Brachioradialis

Answer 30

flexes elbow joint

Question 31

External oblique

Answer 31

both contract: compress the abdomen and flex vertebral column, one: lateral flexion of vertebral column

Question 32

Internal oblique

Answer 32

both: compress abdomen, flex vertebral column; one: lateral flexion of vertebral column

Question 33

Transverse abdominus

Answer 33

primarily compresses abdomen, but can also flex vertebral column

Question 34

Rectus abdominus

Answer 34

flexes vertebral column and compresses abdominal wall