Muscle Functions of Upper Body

Question 1

Buccinator

Answer 1

Compresses cheek, moves food beneath teeth, suction for suckling

Question 2

Frontalis

Answer 2

Wrinkles forehead, elevates eyebrows

Question 3

Levator Scapulae

Answer 3

Elevates scapula

Question 4

Masseter

Answer 4

Elevates and protracts mandible

Question 5

Occipitalis

Answer 5

Moves scalp backwards

Question 6

Orbicularis oculi

Answer 6

Closes eye

Question 7

Orbicularis oris

Answer 7

Close mouth, purse lips, speech

Question 8

Platysma

Answer 8

Depresses mandible and lower lip

Question 9

Semispinalis capitits

Answer 9

Extends neck, rotates, and tilts head

Question 10

Splenius capitis

Answer 10

Turns head to side, extends neck

Question 11

Sternocledidomastoid

Answer 11

Turns head to opposite side, bend neck laterally, if they both contract, the neck flexes

Question 12

Temporalis

Answer 12

Elevates and retracts mandible

Question 13

Trapezius

Answer 13

Extends head and neck, elevates, depresses, and adducts scapula, rotates scapula upward

Question 14

Zygomaticus major/minor

Answer 14

Smile

Question 15

Deltoid

Answer 15

Flexes and medially rotates arm, abducts arm, extends and laterally rotates arm

Question 16

Diaphragm

Answer 16

Flattens to increase volume of thorax for inspiration

Question 17

External abdominal oblique

Answer 17

Compresses abdomen, laterally flexes and rotates vertebral column

Question 18

External intercostals

Answer 18

Elevates ribs for inspiration

Question 19

Internal intercostals

Answer 19

Depresses ribs for expiration

Question 20

Latissimus dorsi

Answer 20

Extends, adducts, and rotates arm medially

Question 21

Pectoralis Major

Answer 21

Flexes, adducts and rotates arm medially

Question 22

Pectoralis Minor

Answer 22

Depresses and protracts shoulder

Question 23

Rectus abdominus

Answer 23

Flexes vertebral column, compresses abdomen, depresses rib cage and stabilize pelvis.

Question 24

Serratus anterior

Answer 24

Rotates scapula upward and laterally

Question 25

Iliacus

Answer 25

Flexes thigh at hip

Question 26

Internal abdominal oblique

Answer 26

Compresses abdomen, laterally flexes and rotates vertebral column

Question 27

Psoas major

Answer 27

Flexes thigh at hip, flexes vertebral column

Question 28

Erector spinae

Answer 28

Maintain posture, extend vertebral column and head, laterally flex vertebral column and head

Question 29

Rhomboideus Major and minor

Answer 29

Downward rotation and adduction of scapula

Question 30

Biceps Brachii

Answer 30

Flexes forearm, supinates forearm

Question 31

Brachialis

Answer 31

Flexes elbow

Question 32

Brachiordialis

Answer 32

Flexes elbow (When arm partially pronated) , supinates forearm

Question 33

Coracobrachialis

Answer 33

Adducts, medially rotates and flexes humerus at shoulder

Question 34

Infraspinatus

Answer 34

Lateral rotation of humerus

Question 35

Subscapularis

Answer 35

Abducts humerus

Question 36

Teres major

Answer 36

Extends, adducts and medially rotates humerus

Question 37

Teres minor

Answer 37

Lateral rotation and adduction of humerus

Question 38

Triceps brachii

Answer 38

Extends forearm

Question 39

Abductor pollicis longus

Answer 39

Abducts and extends thumb

Question 40

Extensor carpi radialis brevis

Answer 40

Extends and abducts wrist (wave)

Question 41

Extensor Carpi radialis longus

Answer 41

Extends and abducts wrist (Wave)

Question 42

Extensor carpi ulnaris

Answer 42

Extends and abducts wrist (wave)

Question 43

Extensor digitorum

Answer 43

Extends phalanges and hand

Question 44

Extensor pollicis brevis

Answer 44

Extends thumb

Question 45

Extensor pollicis longus

Answer 45

Extends thumb

Question 46

Flexor carpi radialis

Answer 46

flexes and abducts wrist (wave)

Question 47

Flexor carpi ulnaris

Answer 47

Flexes and adducts wrist (wave)

Question 48

Flexor digitorum profundus

Answer 48

Flexes phalanges

Question 49

Flexor pollicis longus

Answer 49

Flexes thumb

Question 50

Palmaris longus

Answer 50

Flexes wrist

Question 51

Pronator teres

Answer 51

Pronates fore arm

Question 52

Supinator

Answer 52

Supinates forearm