Muscle Actions 1

Question 1

Frontalis

Answer 1

Raises eyebrows

Question 2

Orbicularis oculi

Answer 2

Moves eyelids

Question 3

Zygomaticus

Answer 3

Smiles

Question 4

Buccinator

Answer 4

Sucks cheeks in, pulls mouth wide

Question 5

Orbicularis oris

Answer 5

Closes mouth and kissing

Question 6

Mentalis

Answer 6

Pouting

Question 7

Platysma

Answer 7

Lowers mandible and pulls corners of mouth down

Question 8

Temporalis

Answer 8

Closes and retracts jaw

Question 9

Masseter

Answer 9

Closes jaw and elevates mandible

Question 10

Stereocleidomastoid

Answer 10

Bilaterally - flexion of neck unilaterally - flexion of neck to same side and rotation to opposite side

Question 11

Splenius capitis & cervicis

Answer 11

Extend and laterally flex spine

Question 12

Erector spinae

Answer 12

Extend and laterally flex spine

Question 13

Quadratus lumborum

Answer 13

Laterally flex spine and extend lumbar spine and maintain upright posture

Question 14

External intercostal

Answer 14

Inspiration

Question 15

Internal intercostal

Answer 15

Expiration

Question 16

Diaphragm

Answer 16

Flattens to create a vacuum for inspiration

Question 17

Rectus Abdominus

Answer 17

Flexes and rotates vertebrae, flexes ribs & stabilizes pelvis

Question 18

External and internal oblique

Answer 18

Trunk rotation and flexion

Question 19

Transverse Abdominus

Answer 19

Compresses abdominal contents

Question 20

Levator ani and coccygeus

Answer 20

Support pelvic viscera

Question 21

Pectoralis major

Answer 21

Arm flexion, adduction, medially rotates arm and raises chest

Question 22

Pectoralis minor

Answer 22

Draws ribs superiorly or scapula inferiorly

Question 23

Serratus anterior

Answer 23

Rotates scapula, abducts and raises arm

Question 24

Deltoid

Answer 24

Arm abduction, assists in flexion, extension and rotation

Question 25

Trapezius

Answer 25

Extend head, raises and retracts scapula, shrugs shoulders

Question 26

Rhomboid

Answer 26

Retracts scapula

Question 27

Latissimus dorsi

Answer 27

Arm extension, adduction, medial rotation, depresses scapula

Question 28

Teres major

Answer 28

Extend, medially rotate and adducts humerus

Question 29

Subscapularis

Answer 29

Medially rotates humorous and stabilizes shoulders

Question 30

Infraspinatus

Answer 30

Laterally rotates humorous and stabilizes shoulders

Question 31

Teres minor

Answer 31

Laterally rotates humorous and stabilizes shoulders

Question 32

Supraspinatus

Answer 32

Abducts humerus and stabilizes shoulders