Oral Cavity- Tongue, Palate, Etc. Flashcards
What is the Oropharyngeal isthmus? And how is it bounded?
The junction of the mouth to the pharynx.
It is bounded above the soft palate and the palatoglossal folds and it is bounded below the dorsum on the tongue.
Describe the communication of the oral vestibule.
The oral vestibule communicates with the exterior through the oral fissure.
When the jaw is closed, communicates with the oral cavity proper behind the 3rd molar tooth on each side,
What does the lateral wall of the vestibule forms and what is its composition?
It is formed by the cheek. The cheek is composited of Buccinator muscles and it lined laterally by the skin and medially by the mucus membrane.
Describe the nerve supply of the oral cavity proper.
The nerve supply of:
Roof —> nasopalantine and greater palatine nerves
Cheek -> buccal nerve
Floor —> lingual nerve
Motor never supply for the muscles of the mouth and lips is —> facial nerve.
What is the hard palate formed and bounded by?
Palatine processes of maxillae and the horizontal plate of palatine bones.
It is bounded by the alveolar arches
The undersurface of the hard palate is covered by what?
Mucoperiosteum
List the components of the soft palate.
Muscle Fibers
Aponeurosis
Lymphoid tissue
Glands
Nerves
Blood vessels
Describe the nerve supply of the soft Palate.
It is supplied by the maxillary nerve branches - greater and lesser palatine nerves, nasopalatine nerve and Glossophyaryngeal Nerve.
Describe the blood supply of the Soft Palate?
(GLASA)
Greater and lesser palatine artery
Sphenopalatine artery (MA)
Ascending palatine artery (FA)
Ascending pharyngeal artery (EA)
Describe the blood supply of the tongue.
Artery - (LTA)
Lingual artery
Tonsillar branch of facial artery
Ascending pharyngeal artery
Vein (LI) -
Lingual vein and Internal jugular vein (VLI)
Describe the Sensory and Motor nerve supply of the tongue.
Sensory nerves: (ALC - PG- BIL)
Anterior 2/3 - lingual nerve (GS) and chordi tempani (SS) - (ALC)
Posterior 1/3 - glossapharyngeal nerve - (PG)
Base- Internal Laryngeal nerve - (BIL)
Motor nerves:
Extrinsic - hypoglossal nerve
Intrinsic - hypoglossal nerve except for the palataglossus
Platoglossus- pharyngeal plexus
What are the tongue movements and what muscles are associated with those movements?
Acronym - DREP
Depression - Hyoglossal and genioglossal muscles act together both sides
Retraction- Styoglossal and hyoglossal
Elevation - styoglossal and palatoglossal
Protrusion - Genioglossal
List the muscles of the Soft Palate.
(TLMPP)
Tensor veli palatini
Levator Veli palatini
Musculus uvulae
Palatoglossus
Palatophyaryneus
What are the muscles of mastication?
Masseter muscles
Temporalis muscles
Medial pterygoid muscles
Lateral pterygoid muscles
On which pharyngeal arches does the anterior 2/3 and posterior 1/3 derive from?
Anterior 2/3 derives form the 1st pharyngeal arches and posterior 1/3 derives from the 2nd, 3rd and 4th pharyngeal arches.
