Oral Cavity Flashcards by Sterben 004

The tongue is divided into left and right halves by
It’s parts and surfaces

Median sulcus

Oral
Oropharynx
Root

Dorsal
Ventral

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The dorsal surface I’d divided into ___ by

Ant. 2/3
Pst.1/3
Sulcus terminalis

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Sulcus terminalis faces backwards and is marked by a pit called

foramen cecum

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The ant. 2/3 is rough contain 3 different kinds of papillae called
And it’s cover in thin mucosa

Filliforn– no tastebud
Fungiform
Folaite
Vallate

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Xteristic of the pst. 1/3

Contains no papillae
It shows nodular surface due to underlying lymphatic nodules and tonsils

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Arrange the papillae base on its position

Vallate– arranged in v shape In front of the terminalis sulcus
At the lateral side of the tongue close to the base is–foliate
Filliform– at the center close to the midline & sensitive to touch
Fungiform–at the tip(apex)

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The inf. /ventral surface of the tongue is connected to the mouth by?

Frenulum of the tongue

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Lat. To the frenulum is the deep lingual vein and lat. To it is a mucosa fold called

Plica fimbriata

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In general what’s the function of the extrinsic and intrinsic muscles

In general, extrinsic muscles alter the position of the
tongue, and intrinsic muscles alter its shape

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List the intrinsic muscles
What’s the xteristic of the intrinsic muscle?

4
Sup. Longitudinal
Inf. Longitudinal
Tranvese
Vertical muscles

It’s confined to the tongue i.e no bony attachment

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List the extrinsic muscles
What’s the xteristic of the extrinsic muscle?

4
Palatoglossus
Genioglosus
Hypoglosus
Styloglosus

Connects the tongue to other supporting structures like hard, soft palate and bones(mandible styloid process, hyoid bone)

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The four intrinsic and four extrinsic
muscles in each half of the tongue are separated by a

median fibrous lingual
septum

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What muscles are responsible for the following movements
1. Protrusion
2. Retraction
3. Elevation
4. Depression

Genioglosus
Stylo and hyo glossus
Stylo and palato glossus
Genio and hyo glossus

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What motor nerve innervate the tongue

Both intrinsic & extrinsic receives motor innervation from CN XII the hypoglossal nerve
Except palatoglossus muscle by pharyngeal plexus

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What sensory nerve innervate the tongue

Ant. 2/3
General sensation of the ant. 2/3 is by lingual nerve
For special sense of the ant. 2/3 is by chorda tympani ( taste fibers
from CN VII)
Pst. 1/3 & Base
For general and special is glossopharyngeal nerve

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Arteries and veins of the tongue

Lingual A(Dorasal) supplies the root of the tongue and Palatine tonsil
Deep Lingual A supplies the body of the tongue
Sublingual A supplies the floor of the mouth and sublingual gland

Deep lingual vein located @ the apex drains pst. to sublingual V and then to inferior jugular vein

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Lymphatic drainage of the tongue

Ant. 2/3
Submandibular and Deep cervical nodes

                  Pst. 1/3 Deep cervical nodes( jugulodigasric mainly)

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What’s the medical term for tongue tied and what causes it?

Ankilogosia due to large frenulum

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During angina pectoris drugs like nitroglycerin is sprayed underneath the tongue for sublingual absorption

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What nerves are responsible for gag reflex

Vagus (X) and glossopharyngeal N (IX)

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The hard palate is formed by
And bounded by

Palatine processes of the maxilla at the front
Horizontally by plates of Palatine bones
Alveolar arch

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The undersurface of the hard palate is covered by

Mucoperiosteom

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What part of the hard palate has incisive foramen

Directly behind the central incisors at the ant. Midline
A route for nasoplalatine nerve

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What are the composition of the soft palate

Study These Flashcards

Mucos membrane (covers the upper and lower surfaces)
Palatine aponeurosis
Muscles

What are the muscles of the soft palate

Tensor veli palatini Levator veli palatini Musculus uvulae Palatoglossus Palatopharyngeus

ACTIONS OF SOFT PALATE MUSCLES READ

Features of the Palatine aponeurosis

Fibrous sheath attached to Pat. Part of hard palate It's the expanded tendon of tensor veli palatini muscle

What's the motor nerve supply for the soft palate

Supplied by pharyngeal plexus except tensor veli palatini Tensor veli palatini = mandibular division of the trigeminal nerve

Sensory innervation of the soft palate

Glossopharyngeal nerve supplies the soft palate

What's the blood supply to the palates

Branches of the maxillary artery Greater and lesser Palatine artery, Sphenopalatine A Ascending Palatine branch of facial artery Ascending pharyngeal of the external carotid artery

What are the four main salivary gland

Major-- 2 Parotid and 2 Submandibular gland Minor-- Sublingual and Multiple minor gland

What's the largest salivary gland

Parotid gland

The parotid gland is mostly of _____ acini

Serous

What's the secretorymotor nervation to the parotid gland

Parasympathetic secretorymotor nervation arises from glossopharyngeal N

What's the route of the glossopharyngeal nerve to the parotid gland

Via tympanic branch--lesser petrosal N--Otic ganglion--- Auriculotemporal Nerve

What are the structures within the parotid gland

Maxillary A&V, Superficial temporal A&V, Facial N, Mandibular, Buccal, cervical, Temporal, Z ygomatic branch

The submandibular gland consists of ____ type of acini

Serous and mucous acini

What's the position of the submandibular gland

It lies below the lower boder of the mandible divided into superficial and deep by the mylohyoid muscle

What's the arterial supply to the submandibular gland

Submental artery

What's the secretorymotor innervation to the submandibular gland

Parasympathetic secretorymotor innervation is from the facial nerve Via chorda tympani-- submandibular ganglion

What's the features of the sublingual gland

It's the smallest and mist deeply situated Each is almond shape lying btw the mandible on the floor of the mouth

Arterial supply to the sublingual gland And innervation

Sublingual and submental artery Same as submandibular

There are about how many minor salivary gland and how are they distributed

450 Mucosa of the lip Cheeks Palate Floor of the mouth Oropharynx Larynx Trachea

The parotid gland, the largest, receives parasympathetic innervation from ____ via

CN IX via otic ganglion

• The submandibular and sublingual glands receive parasympathetic innervation from_____ via . Their ducts open into the oral cavity under the tongue.

CN VII by way of the chorda tympani nerve, lingual nerve, and submandibular ganglion

Calculus formation is common at what salivary gland

Submandibular

Frey's syndrome is as a result of?

Damage to auriculotemporal and great aricular nerve

There are how many deciduous teeths And their classification

20 4 canine 4 incisors 2 molar

The deciduous teeth begin to appear at what age and finish what age

6 months 2 Y Lower appear b4 upper

There are how many permanent teeths And their classification

32 6 molar 4 premolar 4 incisors 2 canine

The permanent teeth begin to appear at what age and finish what age

6 Y Last teeth is the 3 molar @ 17-30

The vestibular surface (labial or buccal) of each tooth is directed_____, and the lingual surface is directed ________

outwardly inwardly

The root of the teeth is fixed to the socket by _____

Periodontium

____ part of the tooth contains the blood vessels and connective T and nerves

Pulp cavity

What transmits BV and nerves to and fro from the pulp cavity via

Pulp canal/root canal Via apical foramen

The tooth socket are located in the _____ spaces of the maxilla and mandible

Alveolar spaces

Apical foramen-- Root canal-- Pulp cavity Coverings, Cement-- Dentine-- Enamel

What's the blood supply to the teeth Veins and lymphatic drainage

The Sup. Branch of Maxillary Artery supplies Maxillary Teeth The Inf. Branch of Maxillary artery supplies Mandibular Teeth Alveolar Vein has the same name Lymph of the tooth and gum drains into Submandibular Lymph Node

Read up on innervation

Oral Cavity Flashcards

(59 cards)