Week 11 Flashcards
What is the name given to spiral appearance of the organ for hearing?
Cochlea.
What fluid is present within the membranous labyrinth?
Endolymph
How is sound or position converted into a neural impulse?
Endolymph is displaced and alters the membrane of a specialized receptor cell.
In what elevations of each part of the vestibular apparatus will receptor cells be identified?
The macula of the saccule, the macula of the utricle, and the crista ampullaris of the ampullae of the semicircular ducts.
What is unique to the receptor cells associated with equilibrium?
Stereocilia and a single kinocilium.
What is the location of the primary afferent neuron associated with equilibrium?
Scarpa’s ganglion or the vestibular ganglion.
Central sensory processes of primary afferent neurons associated with equilibrium will terminate on secondary afferent neurons in what location?
The vestibular nuclear complex.
Receptor cells associated with hearing are located in what structure?
The organ of Corti in the cochlear duct or scala media.
What is the unique feature of receptor cells associated with hearing?
Stereocilia
What is the location of the primary afferent neuron associated with hearing?
The spiral ganglion or cochlear ganglion.
Branchial efferent fibers conveyed in the ninth cranial nerve will innervate what target?
Stylopharyngeus musle
Preganglionic parasympathetic efferent fibers are observed in what primary branch of the ninth cranial nerve?
Tympanic nerve or nerve of Jacobson.
Within the temporal nerve, preganglionic parasympathetic efferent fibers of the ninth cranial nerve will ultimately form what nerve?
The lesser (superficial) petrosal nerve.
Preganglionic parasympathetic efferent fibers will be found in what branch (es) of the ninth cranial nerve?
The tympanic nerve and lesser (superficial) petrosal nerve.
Preganglionic parasympathetic efferent fibers from the ninth cranial nerve will synapse in which ganglion?
Otic ganglion or Arnold’s ganglion.
Postganglionic parasympathetic efferent fibers from the otic or Arnold’s ganglion will communicate with what other cranial nerve branch?
The auriculotemporal branch of the mandibular division of the trigeminal.
Peripheral afferent processes associated with receptors in the mastoid air cells, in the tympaniccavity or in the auditory tube arise from pseudounipolar neurons located in what ganglion of the ninth nerve?
The superior glossopharyngeal ganglion or jugular ganglion.
What is/are the target organ(s) monitoring blood pressure or blood physiology which are supplied by the ninth cranial nerve?
Carotid body or carotid glomus and the carotid sinus.
Ninth cranial nerve pseudounipolar neuron cell bodies monitoring general visceral sensation are located in which ganglion?
Inferior glossopharyngeal ganglion or petrosal ganglion.
Central sensory processes from ninth cranial nerve pseudounipolar neuron cell bodies monitoring general visceral sensation will synapse in what location of the brain?
Cardiorespiratory nucleus of the nucleus solitarius.
Ninth cranial nerve pseudounipolar neuron cell bodies monitoring taste are located in which ganglion?
Inferior glossopharyngeal ganglion or petrosal ganglion.
Branchial efferent fibers conveyed in the tenth cranial nerve will innervate what target organ (s)?
Muscles of the soft palate; constrictor muscles of the pharynx; cricothyroid muscle and palatoglossus muscle.
Where will preganglionic parasympathetic efferent fibers of the tenth cranial nerve synapse?
Intramural ganglia of the target organs and the cardiac plexus.
What is the location of primary afferent neurons of the tenth cranial nerve whose peripheral processes are associated with general somatic sensation from the posterior cranial dura?
Jugular ganglion or superior vagal ganglion.
