Flashcards in The Oral Cavity Deck (69):
Conveniently divided by the arch formed by the teeth and the gums into ORAL VESTIBULE and ORAL CAVITY PROPER
The oral cavity
Anterrior boundary of the oral vestibule
Lateral boundary of the oral vestibule
Superior boundary of the oral vestibule
Mucolabial and muccobuccal folds
Posterior and medial boundary of the oral vestibule
Teeth and gums
Anterior and lateral boundary of the oral cavity
Teeth and gums
Superior boundary of the oral cavity
Hard and soft palate
Inferior boundary of the oral cavity
Tongue and floor of the mouth
Posterir boundary of the oral cavity
Opeing of the pharynx
Features the anterior 2/3 of the tongue, lingual frenulum, lingual vein, sublingual caruncle, sublingual folds, and fimbriated fold.
Consist of dense vascular fibrous tissue which is covered by mucous membrane and is attached to the alveolar margins of the jaw.
Continuous with the mucosa of the oral vestibule externally and the palate or the floor of the mouth internally.
Forms the superior wall or roof of the oral cavity proper.
Hard and soft palate
Covered by MUCOPERIOSTEUM and forms a partition between the oral and nasal cavities.
Two bones forming the hard palate
Palatine process of the maxilla and horizontal plate of the palatine bone
A longitudinal ridge extending from the uvula to the incisive papilla
A small projection of the mucosa indicating the location of the incisive foramen and the anterior limit of the medial raphe.
About six distinct elevations crossing the anterior part of the hard palate
Transverse palatine process or palatine rugae
Are small inconstant pits on the posterior margin of the hard palate on either side of the median raphe.
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.
It is the median conical projection marked by median raphe
Are free margins of the soft palate and splitting two parts as they approach the lateral wall
Encloses the the palatoglossus muscle. Also called the anterior pillsr of fauces or anterior palatine arch
Encloses the palatopharyngeus muscle. Also called posterior pillar of fauces or posterior palatine arch.
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.
Originates form the palatal aponeurosis and inserted to the dorsum and lateral aspect of the tongue. It closes the oropharyngeal isthmus.
Originates from the posterior nasal spine, and is inserted to the uvula. It raises the uvula to help seal oral from nasal pharynx.
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
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
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.
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
Anterior part of the tongue, made up of interlacking skeletal muscles
Body of tongue
Lateral portion of the tongue, free and blunt, in relation to the gums and teeth.
The pointed and free anterior end
Tip or apex
Seen when the tongue is turned upwards
Slightly convex antero-posteriorly and is divided into two parts by a V-shaped groove
V-shaped groove on the dorsum liguae
Sulcus terminalis or linea terminalis
Opened when the mouth is opened, covered by papillae
A faint groove spreading the palaine part into symmetrical parts
A small pit at the apex of the sulcus terminalis
Posterior 2/3s of the tongue which contaisns serous glands and nodules of lymphoid tissue or lingual follicles
In the reflection of the mucous membrane of the tongue on to the epiglottis producing elevation
Largest, numbering form 7-12, and are arranged in front of the sulcus terminalis
Vallate or circumvallate papillae
Fewer in number, and are limited to the tip and margins of the tongue
Smallest and most numerous, scattered all over the anterior 2/3s of the dorsum of the tongue
Receptor organs for the special sensation of taste
The py are pale oval bodies most of which are located surrounding the vallate papillae; few are found on the fungiform and folliate papillae
Muscles resposible for changing position of the tongue
Originates from the genial tubercke of mandible and insters to the tongue. It retracts and depresses the tongue.
Orogin: hyoid bone
Insertion: posterior half of the side of the tongue
Action: depresses the tongue
Origin: styloid process of temporal bone
Insterion: whole length of the tongue
Action: pull the tongue upwards and backwards
Changes the shape of the tongue
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
Narrows the tongue
Flattens the tongue
A fractured mandible may damage the WHAT NERVE to pull tongue to the same side.
A large lingual frenulum can limit mobility of the tongue and interfere with speech. This condition can be easily repaired by cutting the frenulum.
Procedure in cutting the frenulum
One of the three major salivary glands that oriduce and secrete saliva for the oral cavity.
Location of the parotid gland on the superior surface
Posterior border of the ramus of the mandible
Location of the parotid gland on the posterior surface
External auditory meatus and SCM Muscle
Location of the parotid gland, where it is lobulated, covered by skin, fascia, lymph nodes and facial branches of the great auricuoar nerve
Styloid process and its muscles as well as under the mastoid and sternocleidomastoid muscles
Anterior thickening of the capsule, which runs from the styloid process to the angle of the mandible.
Duct for parotid gland
Found partly in the submandibular fossa BELOW the mylohyoid muscle and partly in the floor of the mouth.
Type of secretion of the submandibular gland
Mixed, mostly serous
Duct for the submandibular gland