Oral cavity part 2

Question 1

Intrinsic muscles originate and insert within?

Answer 1

substance of the tongue

Question 2

intrinsic muscles divide into:

Answer 2

superior longitudinal muscles
inferior longitudinal muscle
transverse muscle.
vertical muscle.

Question 3

function of the intrinsic muscle?

Answer 3

to contribute to the precise movement of the tongue required for speech, eating and swallowing.

Question 4

what nerve innervates extrinsic muscle( Genioglossus)?

Answer 4

hypoglossal nerve of trigeminal nerve 2

Question 5

Content of the geioglossus muscle

Answer 5

It is a thick, fan-shaped muscle
that occur on either side 0f the midline septum.

Question 6

Oring and insertion of the genioglossus muscle

Answer 6

originate: from the mental spines, posterior surface of the mandible.

insert: inferior fibers are attached to the hyoid bone
superior fibers held by the intrinsic muscle.

Question 7

Hyoglossus

Answer 7

Is a thin, quadrangular shaped muscle.
Innervated by hypoglossal nerve of the trigeminal nerve

Question 8

origin and insertion of the Hyoglossus muscle?

Answer 8

Origin: Greater horn and body hyoid bone
insertion: between genioglossus and styloglossus

depresses the tongue

Question 9

what are the important landmarks of the oral cavity?

Answer 9

The lingual artery enters the tongue deep into this muscle.
hypoglossal and lingual nerves also enter the tongue superior to muscle.

Question 10

what are the important landmarks of the oral cavity?

Answer 10

The lingual artery enters the tongue deep into this muscle.
hypoglossal and lingual nerves also enter the tongue superior to muscle.

Question 11

Styloglossus muscles, innervation, origin and insertion?

Answer 11

By the Hypoglossal nerve of the trigeminal nerve.

originate: Anterior surface of styloid process of temporal bone.
insertion: lateral surface of tongue where it blends with intrinsic muscle

Question 12

Action of the styloglossus muscle.

Answer 12

Retracts tongue and pulls back of tongue superiorly

Question 13

Muscle of soft palate and tongue

Answer 13

Palatoglossus.
innervated by vagus nerve of trigeminal nerve.

Question 14

The originate and insertion?

Answer 14

Origin: Undersurface of palatine aponeurosis

insertion: Fibers pass anterioinferioly to lateral side of tongue

Question 15

the function of the palatoglossal nerve

Answer 15

Elevate the back of the tongue, moves palatoglossal arches of mucosa towards the midline, and depress the soft palate.

movements facilitate closing the oropharyngeal isthmus and as a result separate the oral cavity from the oropharynx.

Question 16

Braches from the external carotid artery adjacent to the tip of greater horn of the hyoid bone. which artery?

Answer 16

Lingual artery

Question 17

Form and upward bend and then loops down to the ………..

Answer 17

hyoglossus muscle.

Question 18

THE lingual artery travel forward in plane between which muscles to where

Answer 18

between the hyoglossus and genioglossus muscles to the tip of the tongue

Question 19

deep lingual vein

Answer 19

Visible through mucosa of the undersurface of the tongue
separated from the lingula artery in the posterior aspect by the hyoglossus muscle

travels with the hypoglossal nerve to the external surface of the hyoglossus

Question 20

to vein does the Deep lingual vein drains into ?

Answer 20

internal jugular vein

Question 21

Dorsal lingula vein

Answer 21

followa the lingual artery btween the hyoglossus and genioglossus

drain to the internal jugular vein

Question 22

taste and general sensation from posterior one-third of tongue comes from whic nerve

Answer 22

the glossopharyngeal nerve of the trigeminal nerve

Question 23

which nerve also carries parasympathetic and state fibres from oral part of tongue that part is part of facial nerve

Answer 23

lingula nerve

branch of mandibular nerve of CNIX

Question 24

The facial nerve

Answer 24

taste from the anterior two-third of the tongue
special sensory fibers are received from the chorda tympani branch.

Question 25

Hypoglossal nerve

Answer 25

innervate all muscle of the tongue besides palatoglossus

Question 26

Glands that open or secrete into oral cavity.

Answer 26

salivary glands Small glands in submucosa or mucosa of the oral epithelium lining the tongue, palate, cheeks and lips, and open directly or via small ducts.

Question 27

Larger glands in additional to small glands include:

Answer 27

submandibular, paired parotid and sublingual gland

Question 28

gland that extends outside the boundaries of the oral cavity

Answer 28

Parotid gland

Question 29

the parotid gland lies in shallow triangular-shaped impression formed:

Answer 29

1. sternocleidomastoid posteriorly 2.ramus of the mandible anteriorly 3. posterior to aspect of Zygomatic arch superiorly.

Question 30

extends anteriorly and inferiorly over which muscle.?

Answer 30

anteriorly over masseter muscles inferiorly over the posterior belly of digastric muscle

Question 31

parotid duct

Answer 31

passes anterior across the masseter muscle pierces buccinator to open into the cavity. adjacent to second upper moral tooth.

Question 32

A hooked shaped gland.

Answer 32

submandibular gland

Question 33

The larger hook of the mandibular gland

Answer 33

Directed forward in horizontal plane lies deep to mylohyoid muscle lies in the submandibular fossa.

Question 34

Smaller arm of the hook.

Answer 34

loop around posterior origin of mylohyoid muscle lies within the floor of te oral cavity lies lateral to the root of the tongue

Question 35

submandibular duct emerges from and opens where

Answer 35

from the medial part of the deep part of gland opens on the sublingual papilla beside base of the frenulum of the tongue.

Question 36

The lingual nerve loops under which duct?

Answer 36

submandibular duct descends anteriomedially through floor of oral cavity and then ascends into tongue

Question 37

sublingual gland

Answer 37

almost shaped immediately lateral to submandibular duct and associated lingual nerve in floor of oral cavity.

Question 38

where does the sublingual gland lie?

Answer 38

lies in the sublingual fossa superior to anterior one-third of mylohyoid line Superior margin raises an elongated fold of mucosa (sublingual fold) which extends from floor of oral cavity to sublingual papilla beside base of frenulum

Question 39

sulingual gland drains nto what ?

Answer 39

into oral cavity via small ducts which opens into crest of sublingual fold. occasionally, a major sublingual duct will open with submandibular duct on sublingual papillae.

Question 40

Temporomandibular joint

Answer 40

Opening and closing of the mouth and complex chewing or side-side movements of lower jaw. Synovial joint – formed between head of mandible and articular fossa, and articular tubercle of temporal bone

Question 41

The articular surfaces are covered by ?

Answer 41

Fibrocartilage.

Question 42

Joint are divided into two parts, the upper and lower by a............ ?

Answer 42

fibrous articular disc upper- allows head of the mandible to move backward and forward onto articular tubercle causing protraction and retraction of mandible. lower part- allow hinge-like depression and elevation of mandible.

Question 43

the membrane that lines all non-articular surfaces of both upper and lower compartments of the joint and is attached to the margins of the articular disc.

Answer 43

synovial membrane.

Question 44

Fibrous membrane encloses temporomandibular joints complex and is attached:

Answer 44

-superiorly along margin of articular tubercle -laterally and medially along the margins of articular fossa -posterior, to the region of tymponosquamous suture - inferior to upper part of Neck mandible

Question 45

3 ligamnents are present in the temporomandibular joint name them?

Answer 45

lateral ligaments, sphenomandibular ligament and stylomandibular ligament.

Question 46

Movements of the Mandible includes:

Answer 46

depression: Digastric, geniohyoid, mylohyoid muscles assisted by lateral pterygoid muscle

Question 47

Movements of the Mandible includes:

Answer 47

depression: Digastric, geniohyoid, mylohyoid muscles assisted by lateral pterygoid muscle elevation: temporalis, masseter and medial pterygoid muscles protraction: lateral pterygoid muscle, assisted by medial muscle. retraction:geniohyoid and digastric muscle and posterior and deep fibers of temporalis and masseter muscles.

Question 48

A wedge-shaped fossa

Answer 48

infratemporal fossa.

Question 49

The roof of the infratemporal fossa

Answer 49

Roof- formed by greater wing of sphenoid+ temporal bones. foramen ovale , foramen spinosum communicates with temporal fossa

Question 50

The lateral wall of the infratemporal fossa

Answer 50

is medial surface of the ramus of mandible opening to the mandibular canal

Question 51

medial wall

Answer 51

: Lateral plate of pterygoid process + pharynx and soft palate (tensor and levator veli palatini) Communicates with pterygopalatine fossa

Question 52

Anterior wall

Answer 52

the posterior surface of the maxilla. communicates with inferior orbital fissure.

Question 53

name an extracapsular ligament of temporomandibular joint

Answer 53

Sphenomandibular joint.

Question 54

attachment of the sphenomandibular ligament

Answer 54

to the spine of the sphenoid bone and lingula of mandible and posterior margin of the mandibular foramen

Question 55

innervation of the infratemporal fossa?

Answer 55

Maxillary artery Mandibular nerve (CNV3) Facial nerve (CNVII) branches Glossopharyngeal nerve (CNIX) Pterygoid plexus

Question 56

Mandibular nerve of the trigeminal

Answer 56

Gives of motor and sensory all branches originate from infratemporal fossa.

Question 57

The Sensory innervation comes from and enters Where between muscles.

Answer 57

from foramen ovale and enters the infratemporal fossa. Between tensor veli palatini and lateral pterygoid muscles. Meningeal branch Nerve to medial pterygoid

Question 58

The anterior and posterior trunks of the mandibular nerves

Answer 58

Anterior Trunk Buccal, masseteric, deep temporal nerve and nerve to lateral pterygoid Posterior Trunk Auricotemporal, lingual and inferior nerves

Question 59

Auriculotemporal nerve

Answer 59

Originates as two roots, which pass posteriorly to middle meningeal artery as it ascends to foramen spinosum. Ascends between tensor veli palatini and lateral pterygoid muscle Curves around neck of mandible Ascends deep to parotid gland, between temporomandibular joint and ear

Question 60

what does the auriculotemporalis supply to the skin over temple, external ear, external auditory meatus and TMP

Answer 60

general sensation. Carries parasympathetic fibres from CNIX to parotid gland

Question 61

General sensation to anterior two-thirds of tongue, oral mucosa on floor of oral cavity is given by which nerve?

Answer 61

Lingual nerve

Question 62

lingual nerve is joined by ..........branch of facial nerve in the infratemporal fossa.

Answer 62

Chorda tympani

Question 63

how does the lingual nerve supplies and get to the oral cavity.

Answer 63

Descends between tensor veli palatini and lateral pterygoid. Descends across the medial pterygoid muscle to enter the oral cavity. Passes into the tongue on the lateral surface of the hyoglossus and attaches to the submandibular ganglion.

Question 64

as it enters the oral cavity/ floor it lies immediately to what?

Answer 64

inferior to the last molar tooth Palpable through oral mucosa Risk of injury to operations to molar teeth and gingivae

Question 65

the origin of the maxillary artery?

Answer 65

Originates within substance of parotid gland, enters infratemporal fossa between neck of mandible and sphenomandibular ligament Passes through infratemporal fossa to enter pterygopalatine fossa to give rise to terminal branches

Question 66

the 3 parts of the maxillary artery

Answer 66

First part: between neck of mandible and sphenomandibular ligament Middle meningeal Inferior alveolar arteries Second part: related to lateral pterygoid muscle Deep temporal, masseteric, buccal and pterygoid branches Third part: in pterygopalatine fossa

Question 67

Network of veins between lateral and medial pterygoid muscles as well as lateral pterygoid and temporalis muscles is called

Answer 67

pterygoid plexus