This document provides an overview of the anatomy of the oral cavity. It describes the oral vestibule and oral cavity proper, including their boundaries and characteristics. It then discusses the palate, soft palate, tongue and their blood supply, lymphatic drainage, nerve supply and muscles. The palate forms the roof of the oral cavity and consists of the hard and soft palate. The tongue is composed of muscles, glands, tissue and papillae and is involved with tasting, chewing, swallowing and speaking.
2. 1. Oral Vestibule
- lies between the gums and the teeth.
2. Oral Cavity Proper
- lies behind and within the arch of teeth.
3. Oral Vestibule
Boundaries:
1. Anteriorly by the lips,
2. Laterally by the cheeks,
3. Superiorly by the
mucolabial and
mucobuccal folds, and
4. Posteriorly and
medially by the teeth
and gums.
4. Boundaries:
1. Anteriorly and laterally by the
teeth and gums,
2. Superiorly by the palate (hard and
soft),
3. Inferiorly by the tongue and the
floor of the mouth, and
4. Posteriorly by the opening into the
pharynx.
8. PALATE
The palate forms the
superior wall or the roof of
the oral cavity proper.
It is composed of the hard
palate which has an osseous
base, and behind, a soft
palate composed of fibrous
tissue.
9. SOFTPALATE
Tensor veli palatini Tenses the soft palate; opens the
pharyngotympanic tube
Levator veli palatini Only muscle to elevate the soft palate
above the neutral position
Palatopharyngeus
Depresses soft palate; moves
palatopharyngeal arch toward midline;
elevates pharynx
Palatoglossus Depresses palate; moves palatoglossal
arch toward midline; elevates back of the
tongue
Musculus uvulae
Elevates and retracts uvula; thickens
central region of soft palate
MUSLE FUNCTION
A. Tensor veli palatini muscles and the palatine
aponeurosis. B. Levator veli palatini muscles. C.
Palatopharyngeus muscles
12. NERVESUPPLYOFPALATE
• All muscles of soft palate are supplied by Vagus nerve [X]
via pharyngeal branch to pharyngeal plexus
• Except Tensor palatini muscle which is supplied by
Mandibular nerve.
• Sensory supply is derived from lesser palatine branches of
the sphenopalatine ganaglion and from the branches of
glossopharyngeal nerve.
• Secretomotor from Suprior salivary N. through greater
petrosal nerve
13. tongue
“A mobile mass of muscles lying on the floor of the mouth and
associated with the function of taste, chewing, swallowing, and
speaking”.
TONGUE CONSISTS OF
• Mucous membrane
• Mucous glands
• Lymphoid tissue
• Fat
• Striated muscle fibres
• Fibrous tissue
14. PAPILLAE
Circumvallate papillae are arranged in a
row parallel to and in front of sulcus
terminalis
Fungiform papillae are numerous at the
tip and margin of the tongue.
Filliform papillae are prevalent on the
dorsum of the tongue arranged in rows
parallel to sulcus terminalis
15. Muscles of the tongue
INTRINSIC MUSCLES
MUSCLE FUNCTION
SUPERIOR Shortens tongue; curls
apex and sides of
tongue
INFERIOR Shortens tongue;
uncurls apex and turns
it downward
TRANSVERSE Narrows and elongates
tongue
VERTICAL Flattens and widens
tongue All intrinsic muscles are supplied by
Hypoglossal nerve
22. Tip:
• Submental nodes
bilaterally & then deep
cervical nodes
Anterior two third:
• Submandibular
unilaterally & then deep
cervical nodes
Posterior third:
• Deep cervical nodes
(jugulodigastric mainly)
24. REFERENCE
Textbook of Ear, Nose, Throat and Head & Neck Surgery Clinical and Practical
3rd Edition By : P. Hazarika , D.R . Nayak, R. Balakrishnan
Gray’s Anatomy for Students
2nd edition By : Richard L Drake , A Wayne Vogl , Adam W M Mitchell