Muscles Pt. 1

Question 1

Function of the deltoid

Answer 1

Extends and laterally rotates the arm

Question 2

Function of infraspinatus

Answer 2

Laterally rotated arm

Question 3

Teres minor

Answer 3

Extends and laterally rotates the arm

Question 4

Teres major

Answer 4

Extends, adducts and medially rotates arm

Question 5

Latissimus dorsi

Answer 5

Extends, adducts and medically rotates arm

Question 6

Supraspinatus

Answer 6

Assists deltoid in abducting arm

Question 7

Trapezius

Answer 7

Elevates scapula and extends head, adducts and depresses scapula

Question 8

Levator scapulae

Answer 8

Elevates and rotates scapula downward

Question 9

Rhomboid minor

Answer 9

Elevates, adducts and rotates scapula downward, stabilizes scapula

Question 10

Rhomboid major

Answer 10

Elevates, adducts, and rotates downward scapula, also stabilizes it

Question 11

Orbicularis oculi

Answer 11

Closes eye

Question 12

Zygomaticus major

Answer 12

Raises corners of mouth (smiling)

Question 13

Zygomaticus minor

Answer 13

Raises upper lip to expose teeth

Question 14

Orbicularis oris

Answer 14

Closes and purses lips

Question 15

Platysma

Answer 15

Tenses neck and pouts lips, depresses mandible

Question 16

Temporalis

Answer 16

Elevates and retracts mandible

Question 17

Buccinator

Answer 17

Presses cheeks inward to whistle, blow, and suck. Holds food between teeth when chewing

Question 18

Scalenes

Answer 18

Bilateral contraction flexes head and elevates top ribs for deep inhalation. Unilateral contraction laterally flexes head to opposite side and rotates head to opposite side

Question 19

Splenius capitis

Answer 19

Extends head

Question 20

Pectoralis major

Answer 20

Adducts and medially rotates arm

Question 21

Subscapularis

Answer 21

Medially rotates arm

Question 22

Sarratus anterior

Answer 22

Abducts scapula and pulls upward like throwing a punch (boxer’s muscle)

Question 23

Pectoralis minor

Answer 23

Abducts scapula and rotates it downward elevates lower ribs

Question 24

Rectus abdominis

Answer 24

Flexes vertebral column (not laterally) and compresses abdominal

Question 26

External oblique

Answer 26

Bilateral contraction flexes vertebral column and compresses abdomen,. Unilateral contraction laterally flexes and rotates vertebral column to opposite side

Question 27

Internal obliques

Answer 27

Bilateral contraction flexes vertebral column and compresses abdomen. Unilateral contraction laterally flexes and rotates vertebral column to same side

Question 28

Transverse abdominis

Answer 28

Compresses abdomen and stabilizes trunk

Question 29

External intercostals

Answer 29

Increase thoracic diameter by elevating ribs during inspiration

Question 30

Internal intercostals

Answer 30

Decrease thoracic diameter by depressing ribs during forced expiration

Question 31

Diaphragm

Answer 31

Increases length of thoracic rib cage by becoming flat during normal inspiration

Question 32

Sternocleidomastoid

Answer 32

Bilateral contraction flexes head. Unilateral contraction laterally flexes head and rotates head to opposite side

Question 33

Masseter

Answer 33

Elevates mandible

Question 34

Frontalis

Answer 34

Pulls scalp anteriorly, raises eyebrows and wrinkles forehead

Question 35

Occipitalis

Answer 35

Pulls scalp posterior