Tongue T1 Flashcards
The oral cavity is bounded anteriorly by …… and laterally by ……
lips
cheeks
cheeks are continuous with lips at ?
nasolabial grooves
Internally cheeks are lined by
Externally cheeks are covered by
- lined by mucous membrane
- covered by skin, buccal pad of fat, and buccopharyngeal fascia
Define The vestibule (labial cavity), mention its site
- It is a narrow cleft like space
-Lies between the lips & cheeks (extrnally) and
the gum (internally) - It receives the opening of the parotid duct opposite the upper 2nd molar tooth
Mouth cavity proper (Buccal cavity) lies within?
within the alveolar arches, gums, and teeth
What are the Boundaries of mouth cavity proper
Ant & sides/post
• Anteriorly & sides: are formed by the dental arches carrying the teeth
- It communicates with the vestibule behind the 3rd molar tooth,when you close your lips
•Posteriorly : communicate with the oropharynx through “oropharyngeal isthmus” (the junction between mouth & the pharynx)
What are the Boundaries of mouth cavity proper
Roof/Floor
- Roof: Formed by both the hard & the soft palate
- Floor:
- Dorsum (upper surface ) of anterior 2/3 of tongue
- lower surface of tongue
- Below tongue (undersurface of the tongue)
- Myelohyoid muscle
Under Surface of the tongue have for four imp structures what are they?
Frenulum lingulae in the midline
Orifice of the Submandibular Duct
Sublingual Fold
Deep lingual artery and vein
Frenulum lingulae in the midline connects between which two structures?
Connects the under surface of the tounge to the floor of the mouth
submandibular duct opens on?
Opens on each side of the fernulum lingulae
Sublingual Fold is formed by?
By the underlying Sublingual salivary gland
Deep lingual artery and vein are on?
Each side of Frenulum lingulae
Define Ankyloglossia/Tongue tie
- A case in which the Frenulum extends towards the tip of the tongue
- It is a congenital oral anomaly present at birth that restricts the tongue’s range of motion and may interfere with normal speech
What’s the procedure in case of Tounge Tie?
frenotomy or frenulectomy is quick procedure often is done without anesthesia in babies younger than 3 months old because the area has few nerve endings or blood
vessels
What’s the structure of tounge?
A muscular organ formed of mass of muscles covered by an envelope mucous membrane
Site of the tounge?
lies on the floor of the oral cavity filling it almost completely.
• Its anterior 2/3 lies in the mouth (oral part).
• Its posterior 1/3 lies in the pharynx (pharyngeal part).
The tongue is essential for several Important Functions, Name them?
- Normal articulation of the jaw
- Manipulation of food
- Swallowing
- Taste
- Production of normal Speech
What are the Parts of the Tongue?
- Tips and sides
- Root (posterior)
- Dorsal surface (upper)
- Ventral (Lower)
Tips and sides of the tounge lies opposite to?
Gums and teeth
What passes through The Root of the tounge
it is the post. part through which pass the muscles Connecting the tongue to the hyoid bone & mandible
Dorsal sur of the tounge is divided by?
It is divided by a V- shaped groove (sulcus terminalis) into: - - ant. 2l3 (oral part)
- post.1/3 (pharyngeal part)
The apex of the sulcus terminalis is directed? Presenting what?
directed posteriorly &presents a foramen called the foramen Caecum
The Ventral surfaceof the tounge is related to?
It is related to the Floor of mouth & is Covered by a thin
transparent mucosa
The Ventral surfaceof the tounge shows what?
- A raised fold of mucosa in the middle line (Frenulum lingulae)
- On each side of the middle line, a deep lingual vein passes deep to the mucosa
- lateral to the deep lingual v. there is the fimbriated fold- which is a raised fold of mucosa having fimbria
Ant. 2/3 of the dorsum of the tongue papillae are?
- Filliform papillae: small&numerous
- Fungiform papillae: at the tip & margins
- Foliate papillae :small lateral folds, poorly developed in humans
- Circumvallate papillae:lying infront of the sulcus terminalis & full of taste bud
Post. 1/3 of the dorsum of the tongue papillae?
No papillae shown
are there any lingual tonsils on the Post. 1/3 of the dorsum of the tongue
Yes, Present
are there any lingual tonsils on the Ant. 2/3 of the dorsum of the tongue
No, absent
Nerve supply of the buccal part of the tongue
2 Nerves:
1. Lingual Nerve: carries general sensation
2. Chorda tympani: carries taste sensation
Nerve supply of the Pharyngeal part of the tongue
One nerve:
Glossopharyngeal nerve: carries all sensations
Position of both palatine and pharyngeal part?
Palatine part: Looks upward & can be seen from the mouth
pharyngeal part: Looks backwars (forming the anterior wall of the oropharynx)
Lingual papillae, particularly filiform papillae function?
Thry are thought to increase the surface area of the tongue and to increase the area of contact and friction between the tongue and food
