Muscular System — Head, Neck, Chest, Back

Question 1

muscles most responsible for producing a particular movement

Answer 1

prime movers/agonists

Question 2

muscles that oppose or reverse a movement

Answer 2

antagonists

Question 3

muscles that aid the action of agonists by assisting with the movement or reducing undesirable or unnecessary movement

Answer 3

synergists

Question 4

specialized synergists that immobilize the origin of an agonist so all tension is exerted at the insertion

Answer 4

fixators

Question 5

muscle covering side of head

Answer 5

temporalis

Question 6

originates at zygomatic bone, inserts at angle of mandible

Answer 6

masseter

Question 7

masseter origin & insertion

Answer 7

origin: zygomatic arch & zygomatic bone
insertion: angle and ramus of mandible

Question 8

prime mover of jaw closure

Answer 8

masseter

Question 9

sheetlike superficial neck muscle that covers the neck and attaches at lower margin of mandible

Answer 9

platysma

Question 10

muscle stretching from the forehead over to the occipital region

Answer 10

epicranius

Question 11

fixed middle portion of the epicranius

Answer 11

aponeurosis

Question 12

attached to angle of mouth - responsible for drawing corner of lip laterally

Answer 12

risorius

Question 13

principal muscle of cheek, deep to the masseter

Answer 13

buccinator

Question 14

muscle of the chin

Answer 14

mentalis

Question 15

muscle circling the eye

Answer 15

orbicularis oculi

Question 16

muscle circling the mouth

Answer 16

orbicularis oris

Question 17

“smiling muscle”, divided into major and minor

Answer 17

zygomaticus

Question 18

muscle originating at manubrium of sternum and inserting at the temporal bone, behind the ear

Answer 18

sternocleidomastoid

Question 19

posterior muscle leading from occipital region to the shoulder

Answer 19

trapezius

Question 20

forms floor of mouth

Answer 20

mylohyoid

Question 21

slender muscle that runs parallel to the mylohyoid

Answer 21

stylohyoid

Question 22

has two bellies formed by an intermediate tendon that attaches to the hyoid bone

Answer 22

digastric

Question 23

big muscle of the chest

Answer 23

pectoralis major

Question 24

flat, thin muscle deep to the pectoralis major

Answer 24

pectoralis minor

Question 25

fan-shaped muscle attached to each rib

Answer 25

serratus anterior

Question 26

origin and insertion of serratus anterior

Answer 26

origin: lateral aspect of ribs 1-8
insertion: vertebral border of anterior surface of scapula

Question 27

pairs of 11 muscles that lie between ribs

Answer 27

intercostals

Question 28

_______ intercostals leave gaps at the anterior portion of the ribcage

Answer 28

external

Question 29

_______ intercostals leave gaps at the posterior portion of the ribcage

Answer 29

internal

Question 30

broad muscle that forms floor of thoracic cavity

Answer 30

diaphragm

Question 31

most superficial lateral abdomen muscle

Answer 31

external oblique

Question 32

deep to the external oblique, lateral to the rectus abdominis

Answer 32

internal oblique

Question 33

your 6-pack

Answer 33

rectus abdominis

Question 34

deepest muscle of the abdominal wall

Answer 34

transverse abdominis

Question 35

broad flat muscle of lower back

Answer 35

latissimus dorsi

Question 36

near-vertical back muscle originating at the transverse processes of C1-C4, inserting at the scapula

Answer 36

levator scapulae

Question 37

larger back muscle connecting bottom of scapula to humerus; more posterior

Answer 37

teres major

Question 38

smaller back muscle connective bottom of scapula to humerus; more anterior

Answer 38

teres minor

Question 39

broad back muscle connecting scapula to transverse processes of T1-T5

Answer 39

rhomboid major

Question 40

smaller muscle connecting scapula to C7

Answer 40

rhomboid minor

Question 41

back muscle spanning horizontally the superior portion of the scapula

Answer 41

supraspinatus

Question 42

back muscle covering most of scapula

Answer 42

infraspinatus

Question 43

origin & insertion of infraspinatus

Answer 43

origin: infraspinous fossa of scapula
insertion: greater tubercle of humerus

Question 44

spine muscles with three components

Answer 44

erector spinae

Question 45

three components of erector spinae, lateral to medial

Answer 45

iliocostalis
longissimus
spinalis