Muscles of Head, Neck, and Trunk

Question 1

What is the epicranial aponeuosis

Answer 1

it is the tendon that connects the frontalis to the occipitalis

Question 2

Function: Frontal belly

Answer 2

elevate eyebrows and wrinkles forehead skin

Question 3

Function: Occipital belly

Answer 3

Retracts scalp slightly

Question 4

Function: Orbicularis Occuli

Answer 4

close eye

Question 5

Function: Orbicularis Oris

Answer 5

closes and purses lips

Question 6

Function: Zygomatic major

Answer 6

elevates corner of mouth

Question 7

Function: depressor angulioris

Answer 7

depresses corner of mouth

Question 8

Function: Buccinator

Answer 8

pulls cheeks against teeth when chewing

Question 9

Function: Platysma

Answer 9

tenses the skin of neck and depresses lower lip

Question 10

Function: Masseter

Answer 10

elevates and protracts mandible

Question 11

Function: Temporalis

Answer 11

elevates and retracts mandible

Question 12

Function: medial pteryoid

Answer 12

elevates and protracts mandible
moves mandible side to side

Question 13

Function: Lateral pterygoid

Answer 13

elevates and protracts mandible
moves mandible side to side

Question 14

Function: genioglossus

Answer 14

protracts(proturdes) tongue

Question 15

Function: Styloglosses

Answer 15

elevates and retracts tongue

Question 16

Function: hyoglossus

Answer 16

depresses and retracts tongue

Question 17

Function: sternocleidomastoid

Answer 17

rotates head side to side
together: flex the head/neck

Question 18

Function: Splenius Capitis

Answer 18

rotates head side to side
together: extend the head/neck

Question 19

Function: Digastric

Answer 19

elevates hyoid
depresses mandible

Question 20

Function: Stylohyoid

Answer 20

elevates hyoid bone

Question 21

Function: Mylohyoid

Answer 21

elevates hyoid bone
raises floor of mouth

Question 22

Function: Sternohyoid

Answer 22

depresses hyoid bone

Question 23

Function: Omohyoid

Answer 23

Depresses hyoid bone

Question 24

Function: Sternothyroid

Answer 24

Depresses thyroid cartilage

Question 25

Function: Thyrohyoid

Answer 25

depresses hyoid bone raises thyroid cartilage

Question 26

Function: Quadratus Lumborum

Answer 26

together: extend lumbar vert. column unilaterally: laterally flex vert. column

Question 27

where is the quadratus lumborum

Answer 27

iliac crest to the vert. column

Question 28

Function: Erector Spinae

Answer 28

extend vert. column

Question 29

Iliocostalis

Answer 29

most lateral erector spinae

Question 30

Longissimus

Answer 30

intermediate erector spinae

Question 31

Spinalis

Answer 31

most medial erector spinae

Question 32

Function: Diaphragm

Answer 32

contraction pulls the central portion down increases vertical dimensions of the thorax

Question 33

Function: External Intercostals

Answer 33

elevates the rib cage on inhalation

Question 34

Function: Internal Intercostals

Answer 34

depresses ribs during forced exhalation