Throat Anatomy and Physiology Flashcards
(23 cards)
What makes up the 2 parts of the oral cavity?
Oral vestibule
Oral cavity proper
What are the boundaries of the oral cavity?
Lips to palatoglossal arch
Palate to floor of mouth
Buccal mucosa
What pierces the buccinator muscle?
Parotid duct
What 4 muscles are involved in mastication?
Lateral pterygoid
Medial pterygoid
Temporalis
Masseter
What are the boundaries of the oropharynx?
Lower border of soft palate to upper margin of epiglottis
Palatoglossal arch to posterior pharyngeal wall
Laterally by faucial pillars and tonsils
What type of epithelium lines the oropharynx?
Stratified, non keratinised squamous
What nerves supply the oropharynx?
Pharyngeal plexus CN IX and X
How do you test the 9th cranial nerve?
Ask patient to say ‘ah’
How do you test the 10th cranial nerve?
Aak the patient to say ‘ee’
What are the functions of the oral cavity?
Taste Mastication Speech Digestion Swallowing
What part of the tongue does not contain any taste buds?
Filliform papillae
What types of muscles make up the tongue?
Intrinsic muscles (alter shape) Extrinsic muscles (alter position)
What structure closes off the nasopharynx during swallowing?
Soft palate
What closes off the trachea during swallowing?
Epiglottis
What is the blood supply to the hypopharynx?
Superior thyroid artery
Lingual artery
Ascending pharyngeal artery
What is the nerve supply of the hypopharynx?
Pharyngeal plexus (CN IX and X)
What are the 3 subsites of the hypopharynx?
Pryiform sinus
Post cricoid area
Posterior pharyngeal wall
What are the 3 phases of swallowing?
Oral phase
Pharyngeal phase
Oesophageal phase
What is the function of the larynx?
Voice
Swallowing
What are the 3 parts of the larynx?
Supraglottis
Glottis
Subglottis
What are the paired arytenoid cartilages?
Corniculate
Cuneiform
What is the motor innervation of the larynx?
Recurrent laryngeal nerve
Cricothyroid muscle supplied by external laryngeal nerve
What is the sensory innervation of the larynx?
Recurrent laryngeal nerve
Supraglottic supplied by internal laryngeal nerve