CN9 Flashcards
What is the name of the branchial motor nucleus on the ninth cranial nerve?
Nucleus ambiguus.
The ninth cranial nerve has an apparent origin from what part of the brain?
The medulla oblongata.
Branchial efferent fibers conveyed in the ninth cranial nerve will innervate what target?
Stylopharyngeus muscle.
What is the visceral efferent nucleus of origin for the ninth cranial nerve?
Inferior salivatory nucleus.
Preganglionic parasympathetic efferent fibers are observed in what primary branch of the ninth cranial nerve?
Tympanic nerve or nerve of Jacobson.
Within the temporal bone, 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 of the ninth cranial nerves?
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.
The parasympathetic pathway from the ninth cranial nerve will innervate what target?
Parotid gland.
Peripheral afferent processes associated with receptors in the mastoid air cells, in the tympanic cavity or in the auditory tube arise from pseudounipolar neurons located in what ganglion of the ninth cranial nerve?
The superior glossopharyngeal ganglion or jugular ganglion.
Central afferent processes from the pseudounipolar neurons of the ninth cranial nerve associated with receptors in the mastoid air cells, in the tympanic cavity or in the auditory tube will synapse on cells located in what nucleus?
The spinal trigeminal nucleus.
What is/are the target organs 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 the 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.
