Nbde Dental Anatomy Msl

Front 1

Which infrahyoid muscle pulls the larynx downward?
What does it also depress?

Back 1

Sternothyoid Muscle
hyoid bone

Front 2

What is the appearance of the Stenothyroid muscle?

Back 2

Referred to as strap muscles due to ribbon like appearance.

Front 3

Where is the sternothyroid muscle found?

Back 3

Lies between the deep fascia and the visceral fascia covering the thyroid gland trachea and esophagus.

Front 4

What innervates the sternothyroid muscle?

Back 4

Ansa cervicalis (motor plexus from the rami of C 1,2, and 3)

Front 5

What are the infrahyoid muscles?

Back 5

Thyrohyoid
Sternohyoid
Sternothyroid
Omohyoid

Front 6

What is the function of the infrahyoid muscle group?

Back 6

anchor hyoid bone
depress hyoid and larynxwhen swallowing or speaking

Front 7

Pulls the hyoid downward and raises the larynx.

Back 7

Thyrohyoid muscle

Front 8

What innervates the thyrohyoid muscle?

Back 8

C1 via hypoglossal nerve (CN XIII)

Front 9

Pulls the hyoid down

Back 9

Sternohyoid Muscle

Front 10

What is the innervation of the sternohyoid muscle?

Back 10

C1,C2,C3 from ansa cervicalis

Front 11

Helps the Sternohyoid in pulling the hyoid downward.

Back 11

Omohyoid

Front 12

What innervates the omohyoid muscle?

Back 12

C1,C2,C3 by a branch of the ansa cervicalis

Front 13

What two muscles together raise the hyoid bone during swallowing?

Back 13

Mylohyoid muscle
Geniohyoid muscle

Front 14

What two muscles assist the lateral pterygoid muscles in depressing the mandible (opening the mouth)?

Back 14

Mylohyoid muscle
Geniohyoid muscle

Front 15

What two muscles assist the posterior fibers of the temporalis muscles during retraction of the mandible?

Back 15

Mylohyoid muscle
Geniohyoid muscle

Front 16

What are the suprahyoid muscles?

Back 16

Stylohyoid
Digastric
Mylohyoid
Geniohyoid

Front 17

What two muscles form the floor of the mouth?

Back 17

geniohyoid and mylohyoid muscles

Front 18

Pulls the hyoid superiorly and posteriorly during swallowing, and fixes the hyoid bone for infrahyoid action.

Back 18

Stylohyoid muscle

Front 19

What innervates the Stylohyoid muscle?

Back 19

Cervical branch of the facial nerve (CN VII)

Front 20

Opens mouth by depressing mandible (ant. belly)
Fixes hyoid bone for infrahyoid action (post. belly)

Back 20

Digastric muscle

Front 21

What innervates the digastric muscle?

Back 21

Anterior belly-mylohyoid nerve
(Branch of inf. alveolar nerve, and post. belly-facial nerve (CN VII)

Front 22

Elevates the hyoid bone
Raises the floor of mouth (swallowing)
Depresses mand. when hyoid is fixed

Back 22

Mylohyoid

Front 23

Elevates the tongue
Depresses the mandible
Works with mylohyoid

Back 23

Geniohyoid

Front 24

What innervates the geniohyoid muscle?

Back 24

C1 via hypoglossal nerve (CN XII)

Front 25

What muscle do we use to stick out our tongues?

Back 25

Genioglossus muscle

Front 26

What are the extrinsic muscles of the tongue?

Back 26

Genioglossus
Hyoglossus
Styloglossus
Palatoglossus

Front 27

Acts to protrude the tongue and retract the tip of the tongue

Back 27

Genioglossus Muscle

Front 28

Where does the genioglossus originate and insert?

Back 28

Originates: genial tubercle of mand.
Inserts: Dorsum of the tongue

Front 29

Acts to depress the tongue

Back 29

Hyoglossus

Front 30

Where does the Hyoglossus muscle originate and insert?

Back 30

Originates: greater and lesser horn of the hyoid
Inserts: Lateral aspect of the tongue

Front 31

Main function is to retract and elevate the tongue

Back 31

Styloglossus

Front 32

Where does the styloglossus originate and insert?

Back 32

Originates: from styloid process
Inserts: lateral aspect of the tongue

Front 33

Acts to elevate the posterior tongue and closes the oropharyngeal isthmus. Also aids in the initiation of swallowing.

Back 33

Palatoglossus

Front 34

Where does the palatoglossus muscle originate and insert?

Back 34

Originates: From the palatine aponeurosis
Inserts: On the side of the tongue

Front 35

What are the intrinsic muscles of the tongue?
What are they named according to?

Back 35

Longitudinal, Transverse, Vertical
Named according to the three spatial planes that they run

Front 36

What do the Intrinsic muscles of the tongue do?

Back 36

Alter the shape of the tongue
Longitudinal: Shorten tongue
Transverse: narrows tongue
Vertical: flatten & broaden tongue

Front 37

This muscle compresses the cheek, holding food under the teeth, and plays a subsidiary role in mastication.

Back 37

Buccinator

Front 38

What are the muscle of mastication that are responsible for the movement of the mandible in the chewing of food?

Back 38

Masseter
Temporalis
Med. Pterygoid
Lat. Pterygoid

Front 39

What are the movements that the muscles of mastication are responsible for?

Back 39

elevation
depression
retraction
protraction
lateral excursions

Front 40

The breaking down or chewing of food so that it may be easily attacked by digestive enzymes.

Back 40

Mastication

Front 41

Which teeth are responsible of the incision of food

Back 41

Incisors

Front 42

What teeth are responsible for prehension of food?

Back 42

Canines

Front 43

What teeth are responsible for the trituration of food?

Back 43

Premolars and Molars

Front 44

If a patient opens their mouth and their mand. deviates left then what muscle is possibly lessioned?

Back 44

Lt. Lateral Pterygoid

Front 45

Which side will the mand. always deviate when injured?

Back 45

The side of the injury

Front 46

What nerve must be affected for the tongue to deviate?
Which way will it deviate?

Back 46

Hypoglossal Nerve
Deviates toward the affected side

Front 47

What is the main stabilizing ligament of the TMJ?

Back 47

Temporomandibular ligament

Front 48

This ligament restricts downward and posterior movement of the mand. and guides the forward motion of the condyle during opening.

Back 48

Temporomandibular ligament

Front 49

Where does the Temporomandibular lig. originate?

Back 49

The lateral surface of the zygomatic arch and a tubercle on its lower border

Front 50

Where does the temporomandibular lig. Insert?

Back 50

Directed down and back from origination to insert into post. border and lat. surface of the neck of the mandible.

Front 51

What muscle is used to make excursive movements of the mand.?

Back 51

Lateral Pterygoid on the side of the movement

Front 52

Results from the contraction of one lateral pterygoid muscle on the opposite side

Back 52

Lateral Excursions

Front 53

Elevation of the Mand. (during jaw closing)

Back 53

Masseter

Front 54

Elevation of the Mand. (during jaw closing)
Retraction of the Mand. (lower jaw backward)

Back 54

Temporalis

Front 55

Elevation of the Mand. (during jaw closing)

Back 55

Medial Pterygoid

Front 56

What are the movements of the Lateral Pterygoid?

Back 56

Inf. heads: slight depression of mand.
(during jaw opening)
One muscle: lateral deviation of mand.
(to shift lower jaw to opposite side)
Both muscles: Protrusion of Mand.
(lower jaw forward)

Front 57

Results from the bilateral contraction of the posterior (horizontal) fibers of the temporalis muscle. Assisted by the suprahyoid muscles, specifically the ant. and post. bellies of the digastric

Back 57

Retrusion

Front 58

What three pairs of muscles allow for the closing of the mouth?

Back 58

Ant. (vertical) fibers of Rt. and Lt. temporalis muscles
Rt. and Lt. masseter muscles
Rt. and Lt. Medial pterygoid muscles

Front 59

What muscles are used in protrusion?

Back 59

Both Lateral pterygoid muscles

Front 60

What does unilateral contraction of the muscle do to the mand.?

Back 60

Deviates mand. to the contralateral (opposite) side.
Contraction on opposite sides produces side-to-side motion required for grinding food

Front 61

Which muscle is responsible for a left working side movement?

Back 61

Rt. Lateral pterygoid