The Oral Cavity Flashcards Preview

Regional Anatomy (Head And neck) > The Oral Cavity > Flashcards

Flashcards in The Oral Cavity Deck (69):
1

Conveniently divided by the arch formed by the teeth and the gums into ORAL VESTIBULE and ORAL CAVITY PROPER

The oral cavity

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Anterrior boundary of the oral vestibule

Lips

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Lateral boundary of the oral vestibule

Cheeks

4

Superior boundary of the oral vestibule

Mucolabial and muccobuccal folds

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Posterior and medial boundary of the oral vestibule

Teeth and gums

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Anterior and lateral boundary of the oral cavity

Teeth and gums

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Superior boundary of the oral cavity

Hard and soft palate

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Inferior boundary of the oral cavity

Tongue and floor of the mouth

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Posterir boundary of the oral cavity

Opeing of the pharynx

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Features the anterior 2/3 of the tongue, lingual frenulum, lingual vein, sublingual caruncle, sublingual folds, and fimbriated fold.

Sublingual region

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Consist of dense vascular fibrous tissue which is covered by mucous membrane and is attached to the alveolar margins of the jaw.

Gums/gingivae

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Continuous with the mucosa of the oral vestibule externally and the palate or the floor of the mouth internally.

Gums/gingivae

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Forms the superior wall or roof of the oral cavity proper.

Hard and soft palate

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Covered by MUCOPERIOSTEUM and forms a partition between the oral and nasal cavities.

Hard palate

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Two bones forming the hard palate

Palatine process of the maxilla and horizontal plate of the palatine bone

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A longitudinal ridge extending from the uvula to the incisive papilla

Median Raphe

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A small projection of the mucosa indicating the location of the incisive foramen and the anterior limit of the medial raphe.

Incisive papilla

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About six distinct elevations crossing the anterior part of the hard palate

Transverse palatine process or palatine rugae

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Are small inconstant pits on the posterior margin of the hard palate on either side of the median raphe.

Fovea palatine

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Posterior movable portion of the palate, extending from one side of the pharynx to the other, and attached to the posterior border of the hard palate.

Soft palate

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It is the median conical projection marked by median raphe

Uvula

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Are free margins of the soft palate and splitting two parts as they approach the lateral wall

Palatine arches

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Encloses the the palatoglossus muscle. Also called the anterior pillsr of fauces or anterior palatine arch

Palatoglossal arch

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Encloses the palatopharyngeus muscle. Also called posterior pillar of fauces or posterior palatine arch.

Palatapharyngeal arch

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Originated from the palatal aponeurosis, insterts to the lateral wall if the pharynx and posterior border of the thyroid cartilage. It elevates the pharupynx and larynx, and closes the oropharyngeal isthmus.

Palatopharyngeus muscle

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Originates form the palatal aponeurosis and inserted to the dorsum and lateral aspect of the tongue. It closes the oropharyngeal isthmus.

Palatoglossus muscle

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Originates from the posterior nasal spine, and is inserted to the uvula. It raises the uvula to help seal oral from nasal pharynx.

Uvular muscle

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Originates form the lateral aspect of the membranous portion of tbe auditory tube, scaphoid fossa of the sphenoid bone. Inserted to the tendon hooks under hamulus and inserts into the palatal aponeurosis. It tenses the palate and opens the mouth of auditory tube during swallowing and yawning.

Tensor Veli Palatini Muscle

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Originates from the medial aspect of the auditory tube, and inserts directly into the palatine aponeurosis. It elevates the palate during swallowing and yawning.

Levator Veli Palatini Muscle

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It is a mobile mass of muscles lying on the floor of the mouth and associated with the funtion of taste, chewing, swallowing, and speaking.

Tongue

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Lower portion of the posterior half of the tongue through which rgeb extrinsic muscles, blood vessels amd nerves become connected with the organ. It attached to the mandible and the hyoid bone.

Rootof the tongue

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Anterior part of the tongue, made up of interlacking skeletal muscles

Body of tongue

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Lateral portion of the tongue, free and blunt, in relation to the gums and teeth.

Margins

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The pointed and free anterior end

Tip or apex

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Seen when the tongue is turned upwards

Inferior surface

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Slightly convex antero-posteriorly and is divided into two parts by a V-shaped groove

Dorsum linguae

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V-shaped groove on the dorsum liguae

Sulcus terminalis or linea terminalis

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Opened when the mouth is opened, covered by papillae

Palatine part

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A faint groove spreading the palaine part into symmetrical parts

Median sulcus

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A small pit at the apex of the sulcus terminalis

Foramen caecum

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Posterior 2/3s of the tongue which contaisns serous glands and nodules of lymphoid tissue or lingual follicles

Pharyngeal part

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In the reflection of the mucous membrane of the tongue on to the epiglottis producing elevation

Glosso-epiglottic fold

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Largest, numbering form 7-12, and are arranged in front of the sulcus terminalis

Vallate or circumvallate papillae

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Fewer in number, and are limited to the tip and margins of the tongue

Fungiform papillae

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Smallest and most numerous, scattered all over the anterior 2/3s of the dorsum of the tongue

Filiform papillae

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Receptor organs for the special sensation of taste

Taste buds

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The py are pale oval bodies most of which are located surrounding the vallate papillae; few are found on the fungiform and folliate papillae

Taste buds

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Muscles resposible for changing position of the tongue

Extrinsic muscles

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Originates from the genial tubercke of mandible and insters to the tongue. It retracts and depresses the tongue.

Genioglossus muscle

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Orogin: hyoid bone
Insertion: posterior half of the side of the tongue
Action: depresses the tongue

Hyoglossus muscle

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Origin: styloid process of temporal bone
Insterion: whole length of the tongue
Action: pull the tongue upwards and backwards

Styloglossus muscle

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Changes the shape of the tongue

Instrinsic muscles

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Located close to the dorsum of the tongue and shortens the length of the tongue and to curl the tip of the tongue and back.

Superior and Inferior Longitudinal Muscles

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Narrows the tongue

Transverse muscle

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Flattens the tongue

Vertical muscles

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A fractured mandible may damage the WHAT NERVE to pull tongue to the same side.

Hypoglossal nerve

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A large lingual frenulum can limit mobility of the tongue and interfere with speech. This condition can be easily repaired by cutting the frenulum.

Tongue tied

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Procedure in cutting the frenulum

Lingual frenectomy

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One of the three major salivary glands that oriduce and secrete saliva for the oral cavity.

Parotid gland

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Location of the parotid gland on the superior surface

Posterior border of the ramus of the mandible

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Location of the parotid gland on the posterior surface

External auditory meatus and SCM Muscle

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Location of the parotid gland, where it is lobulated, covered by skin, fascia, lymph nodes and facial branches of the great auricuoar nerve

Superficial surface

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Styloid process and its muscles as well as under the mastoid and sternocleidomastoid muscles

Deep surface

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Anterior thickening of the capsule, which runs from the styloid process to the angle of the mandible.

Stylomandibular ligament

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Duct for parotid gland

Stensen's duct

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Found partly in the submandibular fossa BELOW the mylohyoid muscle and partly in the floor of the mouth.

Submandibular gland

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Type of secretion of the submandibular gland

Mixed, mostly serous

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Duct for the submandibular gland

Wharton's duct

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A mucous secreting gland, and smallest of the three major salivary glands, which rests UPON/ABOVE the mylohyoid muscle

Sublingual gland