H&n Muscles Of Mastication

Front 1

O: ant. 2/3 of inf border of zygomatic arch

I: lat. surface of angle of mandible

A: Elevatio of mandible

Back 1

Superficial Head of Masseter
(powerful)

Front 2

O: post. 1/3 of med. surface of zygomatic arch

I: lat. surface of ramus

A: eleaation of mandible

Back 2

Deep head of Masseter

Front 3

O: temporal

I: coronoid process of mandible

A: ant.= elevation of mandible
post.= slight retrusion

Back 3

Temporalis
(fan shaped)

Front 4

O: inf. surface of greater wing of sphenoid

I: ant. surface of condyle neck (some fibers insert on capsule of TMJ)

A: slightly depresses mandible

Back 4

Superior head of Lateral pterygoid

one contracts = cont left moves rt

both contract = protrusion

Front 5

O: lat. surface of lat. pterygoid plate

I: ant. surface of condyle neck (some fibers insert on capsule of TMJ)

A: slight depression

Back 5

Inferior head of lateral pterygoid

Front 6

O: pterygoid fossa on med. surface of lat. pterygoid plate

I: med. surface of angle of mandible

A: elevation of mandible

Back 6

Medial pterygoid

Front 7

O: intermediate tendon (seperates the 2 bellies)

I: med. surface of mandible

A: Depresses mandible

Back 7

Anterior belly of Digastric

Front 8

O: Mastoid process (rough area on mandible)

I: Intermediate tendon

A: Elevates hyoid and larynx

Back 8

Posterior belly of Digastric

Front 9

O: Mylohyoid line of mandible
(forms most inf floor of mouth)

I: body of hyoid

A: Elevates hyoid, depresses mandible, elevates tongue

Back 9

Mylohyoid

Front 10

O: Genial tuberclues
(superior to mylohyoid)

I: Body of hyoid

A: Elevates hyoid, depresses mandible

Back 10

Geniohyoid

Front 11

O: Styloid process of the temporal bone

I: Body of hyoid

A: elevates hyoid

Back 11

Stylohyoid

Front 12

O: posterior portion of sternum

I: thyroid cartilage
(attatches to thyroid by thyroid cartilge)

A: Depresses thyroid cartilage and larynx

Back 12

Sternothyroid

Front 13

O: tendon from inf. belly
(2 muscles seperated by a tendon)

I: lat. border of hyoid

A: Depresses hyoid

Back 13

Superior belly of Omohyoid

Front 14

O: Scapula

I: Tendon to superior belly

A: depresses hyoid

Back 14

Inferior belly of hyoid

Front 15

O: Thyroid cartilage

I: body of greater cornu of hyoid

A: Depresses hyoid
raises thyroid cartilage and larynx

Back 15

Thyrohyoid

Front 16

small/numerous projections found on the body of the tongue

Back 16

Filiform

Front 17

less numerous (taste buds) projections found on the body of the tongue

Back 17

Fungiform

Front 18

least number of projections V shaped (taste buds) found along the body of the tongue

Back 18

Circumvallate

Front 19

Projections found along the lateral border of the tongue

Back 19

Foliate papilla

Front 20

found on the inferior portion of the tongue when the thyroid doesn't migrate in utero

Back 20

Lingual Thyroid

Front 21

In utero the thyroid migrates down the __ __ __ and then the duct breaks up

Back 21

thyroid glossal duct

Front 22

Leftover from the migration of the thyroid; found at the V or terminalis sulcus which seperates the tongue into anterior 2/3rds and posterior 1/3rd

Back 22

Foramen Secum

Front 23

Muscles found within the body of the tongue are called __

Back 23

Intrinsic

Front 24

Intrinsic tongue muscle that shortens, thickens and curls the tongue found at the top of the tongue

Back 24

Superior longitudinal

Front 25

Intrinsic tongue muscles that lengthens and narrows the tongue found in the posterior portion of the tongue

Back 25

Transverse

Front 26

Intrinsic tongue muscle that shortens, thikens and curls the tongue found at the bottom of the tongue

Back 26

Inferior Longitudinal

Front 27

Intrinsic tongue muscle that lengthens and narrows the tongue, found in the anterior portion of the tongue

Back 27

Vertical

Front 28

Tongue muscles with an origin outside the tongue and an insertion in the base are called ___ muscles

Back 28

Extrinsic

Front 29

Extrinsic tongue muscle that protrudes and depresses portions of the tongue

Back 29

Genioglossus

Front 30

Extrinsic tongue muscles that retract the tongue

Back 30

Styloglossus

Front 31

3 muscles that raises Pharynx and Larynx

Back 31

Superior, middle and inferior pharyngeal constrictor

Front 32

Elevates and widens pharynx to allow swallowing

Back 32

Stylopharyngeus

Front 33

sup., middle and inf. pharyngeal constrictors contract in sequence for __ or "milking" of food to occur; aids in swallowing

Back 33

peristalsis

Front 34

depresses soft pallate

elevates arches of the tongue

Back 34

anterior tonsilar pillar aka palatoglossus

Front 35

moves palate posteriorly and inferiorly

moves posterior pharyngeal wall anteroposteriorly

Back 35

posterior tonsillar pillar aka palatopharyngeus

Front 36

raises soft palate to pharyngeal wall

Back 36

levator veli platini

Front 37

tenses and lowers soft palate

Back 37

tensor veli palatine

Front 38

raises uvula to pharyngeal wall

Back 38

muscle of uvula

Front 39

wrinkles forehaed

Back 39

epicranial

Front 40

closes eyelids

Back 40

obicularis oculi

Front 41

closes or purses lips

Back 41

obicularis oris

Front 42

shortens cheek vertically and horizontally

Back 42

buccinator

Front 43

widens smile horizontally

superficial to the buccinator

Back 43

risorius

Front 44

elevates upper lip

Back 44

levator labii superioris

Front 45

flares nostrils; elevates upper lip and alae of the nose

Back 45

levator labii superioris alaeque nasi

Front 46

widens smile; elevates angle of lip and pulls it laterally

Back 46

zygomaticus major

Front 47

elevates upper lip

Back 47

zygomaticus minor

Front 48

elevates angle of the mouth; smile

Back 48

levator anguli oris

Front 49

depresses angle of the mouth

Back 49

depressor anguli oris

Front 50

depresses lower lip exposes incisors

Back 50

depressor labii inferioris

Front 51

wrinkles chin

Back 51

mentalis

Front 52

pulls corner of the mouth down

Back 52

platysma

Front 53

O: sternum and clavicle

I: mastoid

A: nod and shake head yes/no

Back 53

sternoclyidomastoid