Throat

9 flashcards · Other · by Amanpreet Kaur

1. What are the 2 parts of oral cavity? What are the boundaries of oral cavity?

   Oral vestibule (between lips & teeth). Oral cavity proper. Lips to palatoglossal arch (anterior pillar). Palate to floor of mouth/tongue. Buccal mucosa.

2. What are the functions of oral cavity?

   Taste Mastication (teeth, tongue) Speech (tongue, cheek, lips) Digestion (salivary enzymes) Swallowing (tongue, hard & soft palate).

3. What are the 2 parts of the tongue, what is their innervation?

   Anterior 2/3: from 1st branchial arch. Sensation by lingual nerve (branch of CN V3). Taste by chorda tympani (branch of CN VII). Posterior 1/3: from 3rd branchial arch. supplied by CN IX.

4. Do filiform papillae (most numerous) contain taste buds?

   No

5. Tongue: which muscles alter shape? which muscles alter position? Which nerves supply it?

   intrinsic muscles extrinsic muscles CN XII: hypoglossal nerve supply all except for palatoglossus - pharyngeal plexus (CN IX - X)

6. What are the functions of the tongue?

   Taste Mastication Swallowing Speech

7. What are the extrinsic muscles of the tongue?

   Genioglossus Styloglossus Hyoglossus Palatoglossus

8. Mastication: what are the muscles for it? Its nerve supply? Function?

   Four muscles: lateral pterygoid, medial pterygoid, temporalis, masseter CN V3 Acting on TMJ: Food positioned between teeth for grinding by action of tongue and cheek

9. Oropharynx: Boundaries? Epithelium? Nerve supply?

   Lower border of soft palate to upper margin of epiglottis. Palatoglossal arch to posterior pharyngeal wall. Lateral: faucial pillars & palatine tonsils. Stratified, non-keratinised squamous Pharyngeal plexus: CN IX & X