Anatomy Final 28&30

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Sensation to the maxillary labial gingiva is supplies by the nasopafine nerve bc this nerve branches off the infraorbital as it travels to supply to the maxillary anterior terth

Both are false

The facial nerve innervates muscles of facial expression & mastication. The facial nerve is the 5th cranial nerve.

Both are false

The orbicularis oris and orbicularis oculi circle the oral cavity. Muscles of the orbicularis oculi circle the lips like a purse strimg

Both are false

The palatine glands are responsible for taste perception because they contain special taste enhancing cells

Both are false

The pharynx has 4 components. The laryngeal pharynx is a middle component of the pharynx.

Both are false

Hyoid muscles have a role in depressing the mandible. This includes the suprahyoid and the thyrohyoid muscles.

Both are true

Labial glands are primarily located on the labial gingiva. These purely serous glands provide watery lubrication for all labial areas

Both false

Minor salivary glands produce enough saliva to mix with food. They are smaller than the major glands but have longer ducts

Both false

Muscles grouped around the mouth do not influence tooth alignment bc abnormal pressures from one group are balanced by other groups

Both false I

Muscles of mastication are innervated by the 5th cranial nerve bc they develop from the 1st pharyngeal arch

Both statements are correct & related

Which muscle plays a role in mastication

Buccinator

Motor supply to the tensor veli palatini comes from the trigeminal nerve

True

Contraction of only the posterior portion of the temporalis muscle retired the mandible bc this action also depresses the mandible.

Correct: false

Which muscle of mastication does not have two origins

Temporal

Which muscles of mastication fans out widely at its origin

Temporal

Hyoid muscles located above the hyoid bone are called suprahyoid muscles. when contracted, most muscles of this group elevate the mandible.

True, False

The common cartoon artery divides into the external and internal arteries. The division occurs at the hyoid bone

True: false

The larynx moves up and down during swallowing. The thyrohyoid muscle pulls the larynx down

True: false

The parasympathetic nervous system controls salivary secretions. It also controls blood flow to the salivary glands.

True: false

The sublingual gland can appear larger than normal in an endentulous patient because loss of the mandibulae ridge of bone makes this gland appear to bulge

True; false

The sternocleiodomastoid muscle has an origin at the superior border of the scapula. When muscle contracts it pulls the hyoid bone down.

false, true

masseter muscle is probably the most powerful muscle of the suprahyoid group. when it contracts, it elevates the mandible which closes mouth.

false, true

Contraction of only the posterior portion of the temporalis muscle retrudes the mandible bc this action also depresses the mandible

correct but reason is not

the orbicularis oris is probably the most important muscle of the mouth bc in addition to its role in forming facial expressions, aka an accessory muscle of mastication

neither the statement nor the reason is correct

Vertical fold of tissue in front of and behind each palatine tonsil is

All of the abobe

the lateral pterygoid performs each of the following actions upon the mandible EXCEPT

retrusion

If the left lateral pterygoid contracts, the mandible will move to the left because one of the lateral pterygoid muscles acting by itself accomplishes lateral excursion

statement is not correct, reason is

If the left pterygoid contracts, the mandible will move to the left bc one of the lateral pterygoid muscles acting by itself accomplishes lateral excursion

statement is not correct, reason is

Which muscle opens and closes nostrils

Nasalis

Maxillary premolars are drained by sub mental nodes

False

Spasms origination from the TMJ can be referred to sternocleidomastoid muscle

False

The risorius muscle pulls the corners of the mouth down as a frown

False

The suprahyoid and thyrohyoid muscles control laryngeal movements

False

The suprahyoid muscles are innervates by cranial neeves

False

All muscles of mastication insert into the disk of the TMJ. Blood supply to these muscles comes from the maxillary artery, which is a branch of the cartoid

False, true

The mentalis muscle fibers originate in the mental foremen. These fiber terminate by inserting into the skin of chin

False, true

The temporal muscle has a very narrow origin. Contraction of entire temporalis elevated the mandible

False, true

the mylohyoid muscle originates from the mylohyoid line on the medial surface of each side of the maxilla. The left & right muscles fuse into what is known as a raphe

False, true

During an extra oral exam it is necessary to palpate beneath the sternothyroid muscle bc enlarged lymph nodes may be there

False: true

Muscles of the oral pharynx seal off the nasal cavity from the oral cavity. This action also narrows the space between the two palatine tonsils

False: true

The dilator naris raises the nostrils. This muscle causes the nostrils to flare

False: true

The hyoid bone, a portion of the zygomatic arch, is unusual bc it articulates with no bone

False: true

The sternocleidomastoid has an origin at the superior border of the scapula. When muscle contracts it pulls the hyoid bone down

False: true

The mandible is elevated by each of the following except one

Geniohyoid

Which muscle originates from the lower rim of the orbit

Levator labii superioris

The floor of the mouth is formed by which muscle

Mylohyoid

A fascial infection of the sub mental space would spread where

Parapharyngeal

The facial nerve innervates each except

Soft palate

The orbicularis oculi raises the eyelid bc fibers of this muscle attach to the medial and lateral borders of the orbit

Statement is not correct, reason is

The orbicularis oculi raises the eyelids bc fibers of this muscle attach to the medial & lateral borders of the orbit

Statement is not correct, reason is correct

Each of the following is a muscle of the suprahyoid group except one

Thyrohyoid

the action of the orbicularis oris is to close and compress the lips

true

the insertion of a muscle is attached to the more movable structure

true


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