Flashcards in Throat Anatomy and Physiology Deck (15)
What is a Bifid Uvula and what is the clinical significance?
Split in the Uvula
Associated with cleft palate
Need to check
Describe the oral cavity
-Oral vestibule (between lips and teeth)
-Oral cavity proper
-lips to palatoglossal arch (anterior pillar)
-Palate to floor of mouth/tongue
Describe the course of the parotid duct
Pierces the buccinator muscle, then opening up into the oral cavity on the inner surface of the cheek, usually opposite the maxillary second molar
Describe the course of the submandibular duct
Lying superior to the digastric muscle, each submandibular gland is divided into superficial and deep lobes, which are separated by the mylohyoid muscle
Describe the lingual nerve
Supplies the general somatic afferent innervation from the anterior two-thirds of the tongue.
The lingual nerve is a branch of the mandibular division of the trigeminal nerve.
It also carries nerve fibres that are not part of the trigeminal nerve, including the chorda tympani nerve of the facial nerve, which provides special sensation (taste) to the anterior 2/3 part of the tongue
What are functions of the oral cavity?
Mastication (teeth, tongue)
Speech (tongue, cheek, lips)
Digestion (salivary enzymes)
Swallowing (tongue, hard and soft palate
Describe the innervation of the tongue
-From 1st branchial arch
-Sensation by lingual nerve (branch of CN V3)
-Taste by chorda tympani) (branch of CN VII)
-From 3rd branchial arch
-Supplied by CN IX
Filliform papillae DO NOT contain taste buds
Describe the muscles and nerves involved in the movement of the tongue
-Intrinsic muscles (alter shape)
-Extrinsic muscles (alter position)
-CN XII: hypoglossal nerve supply all except for palatoglossus (pharyngeal plexus- CN IX-X)
What are the functions of the tongue?
What are the extrinsic muscles of the tongue?
Genioglossus, Styloglossus, Hyoglossus and Palatoglossus
Describe the muscles of mastication and their innervation
-Acting on TMJ
What are the boundaries of the oropharynx?
Lower border of soft palate to upper margin of epiglottis
Palatoglossal arch to posterior pharyngeal wall
Lateral: faucial pillars and palatine tonsils
What is the epithelium and nerve supply of the oropharynx?
Stratifies, non-keratinised squamous
Pharyngeal plexus- CN IX and X
What is the blood and nerve supply of the hypopharynx?
-Superior Thyroid artery,
-Ascending Pharyngeal Artery
Nerve supply is from the pharyngeal plexus (CN IX and X)