Lecture 2 Throat Flashcards
Name the 2 parts of the oral cavity
Oral vestibule
Oral cavity proper
What are the boundaries of the oral cavity
Lips to palatoglossl arch
Palate to floor of mouth/tongue
Buccal mucosa
What muscle does the parotid duct pass over and what muscle does it pierce
Masseter muscle
Buccinator muscle into oral cavity on the inner surface of the cheek opposite the maxillary 2nd molar
What separates the deep and superficial lobes of the submandibular gland
Mylohyoid muscle
What branch of the mandibular division of the Trigeminal nerve supplies general somatic afferent innervation to the anterior 2/3rds of the tongue
Lingual nerve
What does the lingual nerve also carry that is not part of the Trigeminal nerve
Chorda tympani nerve of the facial nerve
What is the function of the chorda tympani of the facial nerve
provides special sensation (taste) to the anterior 2/3rds of the tongue
What are the oral cavity functions
Taste Mastication Speech Digestion Swallowing
What are the 2 parts of the tongue
Anterior 2/3rds
Posterior 1/3rd
Where does the anterior 2/3rds of the tongue originate from
1st branchial arch
Where does the posterior 1/3rd of the tongue originate from
3rd branchial arch
What nerve supplies the posterior 1/3rd of the tongue
CN IX
What nerve supples the anterior 2/3rds of the tongue
Sensation by lingual nerve (branch of CN V3)
Taste by chorda tympani (branch of CN VII)
What structures form the projections on the tongue
Filiform papillae
Fungiform papillae
Folliate papillae
Circumvallate papillae
What projection on the tongue does not contain taste buds
Filliform papillae
What type of muscles does the tongue contain
Intrinsic and extrinsic
What are the functions of the intrinsic and extrinsic muscle
- Intrinsic muscles (alter shape)
* Extrinsic muscles (alter position)- Genioglossus, styloglossus, hyoglossus and palatoglossus
Name the nerve supply of the muscles of the tongue
CN XII: hypoglossal nerve supply all except for palatoglossus – pharyngeal plexus (CN IX - X)
Name the four muscles of mastication
- Lateral pterygoid
- Medial pterygoid
- Temporalis
- Masseter
What is the nerve supply of the muscles of mastication and their function
CN V3
Acting on TMJ
What epithelium lines the oropharynx and what is its nerve supply
Stratified, non-keratinised squamous
Pharyngeal plexus- CN IX & X
What is the blood supply of the Laryngopharynx and nerve supply
the Superior Thyroid Artery, the Lingual Artery and the Ascending Pharyngeal Artery.
Pharyngeal plexus
What are the 3 subsides of the laryngopharynx
- Pyriform sinus
- Post-cricoid area
- Posterior pharyngeal wall
What are 3 phases of swallowing
Oral phase
Pharyngeal
Oesophagus
