Anatomy of the palate and pharynx Flashcards
Where is the oral vestibule located?
Between the lips and teeth
What is the oral cavity?
Above the tongue
Below the palate
What is the oral cavity proper?
Bottom of tongue to palate
Where is the hyoid bone?
Level of C3
What does the frenulum connect?
Inferior surface of tongue to base of mouth?
What is the sublingual caruncle?
Bump on frenulum that is an opening for the submandibular glands
What innervates the geniohyoid?
C1 via hypoglossal nerve
What innervates the mylohyoid muscle?
CN V3
What are the 3 major salivary glands?
Parotid
Sub mandibular
Sub lingual
Where are the minor salivary glands found?
1000s in oral mucosa
What do the minor glands do?
Basal secretion
Keep mouth moist
What stimulates salivation?
Thought, sight, smell of food or presence of food in the mouth
Painful oral conditions
Where does the parotid gland secrete into mouth?
By upper 2nd molar
Where does the submandibular gland secrete?
Via lingual caruncle
Where does the sublingual gland secrete via?
Several ducts superiorly
What can cause swelling of the glands?
Duct clogging/blockage
What supplies parasympathetic innervation to the parotid gland?
CN IX
What cranial nerve supplies the sublingual salivary gland and parasympathetic axons to submandibular?
CN VII
What supplies general sensory to the anterior 2/3rds of tongue?
Cn V3
What supplies taste the the ant 2/3rd of tongue?
CN VII
What supplies taste and sensation to post 1/3rd of tongue?
CN IX
What is the tongue made of?
Skeletal muscle
Covered in mucosa
Where does the thyroid originate?
In the pharynx
Where does the thyroid descend through?
Foramen caecum of tongue
Where can thyroglossal duct cysts occur?
Any position in the midline migratory path
What are the 4 muscles of the tongue?
Palatoglossus
Styloglossus
Genioglossus
Hyoglossus
What supplies all tongue muscles except palatoglossus?
Hypoglossal nerve
What supplies the palatoglossus?
Vagus
What is the course of the hypoglossal nerve?
Through hypoglossal canal
Descends in neck lateral to carotid sheath
At level of hyoid bone as it passes anteriorly towards the lateral aspect of the tongue
Supplies most of the muscles of the tongue
How can CN XII be tested?
Ask patient to stick their tongue straight out
If both CN XIIs are functional the tongue tip remains in the midline
If unilateral damage to tongue tip will point towards the side of the injured nerve