Mouth, Tongue and Larynx Flashcards
What ganglion does the facial nerve supply?
Pterygopalatine & Submandibular Ganglion
Where are these structures found:
- Glossopharyngeal nerve
- Styloglossus muscle
- Superior pharyngeal constrictor muscle
Floor of the Tonsillar Fossa
What muscle is responsible for protrusion of the tongue?
Genioglossus
What structure forms the boundary between the oral cavity and the oropharynx?
Palatoglossal fold
Which of the following muscles are responsible for the arches forming the tonsillar fossa?
Palatoglossus and Palatopharyngeus muscles
What tract is the glossopharyngeal nerve off of?
Solitary tract
What surrounds the solitary tract in slide and where does it send it’s axons?
Solitary nucleus = cell bodies
-It’s axons -> thalamus -> insular cortex -> frontal orbital cortex
What does the hypoglossal nerve innervate?
All tongue muscles except the palatoglossuss. Motor fibers!
What innervates (sensory) the back 1/3 of the tongue?
Glossopharyngeal nerve for general and special sense.
What innervates some taste buds in the epiglottis area in young people
Internal Laryngeal nerve (CN X-Vagus)
What innervates (sensory) the anterior 2/3 of the tongue?
Lingual nerve (V3) - General sensory Chorda tympani (CN VII) - Special sensory
What ganglion do taste/tongue fibers go back to?
Geniculate ganglion –> solitary nucleus
What nerve is responsible for referred pain to the middle ear from infections involving the tonsillar fossa?
Glossopharyngeal Nerve
What ganglia is responsible for sensory nerve fibers innervating the taste buds associated with the circumvallate papillae?
Glossopharyngeal ganglia
What ganglia is responsible for sensory nerve fibers innervating the taste buds associated with the fungiform papillae found in the anterior 2/3 of the tongue?
Geniculate ganglia
Which of the following ganglia is responsible for nerve fibers innervating the piriform fossae?
Vagal ganglia
When performing the neurological exam of the cranial nerves and the patients tongue protrudes to the left when the patient is asked to stick out their tongue, what cranial nerve is showing a deficit?
Hypoglossal Nerve
What happens in people who chew tobacco?
The tobacco can cause irritation in the depression of the epiglottis. May lead to development of squamous cell carcinoma that might not be painful at first but then spreads all over the throat/larynx.
What pierces the thyrohyoid membrane?
Internal Branch of the Superior Laryngeal Nerve & Superior Laryngeal Artery
What does the Internal Branch of the Superior Laryngeal Nerve supply?
Sensory information to the area of larynx above the vocal fold and area of piriform fossa.
What is the rima glottidis?
The space between the two vocal folds and the narrowest part of the laryngeal cavity when the interval between the vocal folds is closely approximated as in phonation.
What is the glottis?
Vocal folds + rima glottidis.
What supplies sensory information to the vocal cords and regions below the cord?
Recurrent Laryngeal Nerve (branch of vagus)
What is the function of the posterior cricoarytenoid?
It is the only muscle that abducts the vocal folds/rima glottidis.
What muscle is responsible for opening the rima glottides?
Posterior cricoarytenoid muscle
What muscles are responsible for elevating the larynx?
Geniohyoid, Mylohyoid, Palatopharyngeus, Salpingopharyngeus, Stylohyoid, Thyrohyoid
What nerve innervates the intrinsic muscles of the larynx?
Recurrent (inferior) laryngeal nerve
What innervates the larynx superior to the true vocal cord?
Internal branch of the superior laryngeal nerve.
