Flashcards in Facial Nerve Deck (67)
What type of fibers are carried by CN VII?
motor and sensory
T/F: CN VII is know as "the great sensory nerve of the face."
False; it is the "nerve of facial expression."
What is the primary nucleus of origin for CN VII?
motor nucleus of the facial nerve
What does the superior salivatory nucleus contribute tot the facial nerve?
pregnglionic parasympathetic fibers
Where do sensory fibers carried in the facial nerve terminate?
upper part of the solitary nucleus
What is the other name for the solitary nucleus?
Where are the cell bodies of the sensory neruons found for CN VII?
What is the proper name for the eardrum?
lateral tympanic membrane
Where is general sensation from the external ear and lateral tympanic membrane carried to?
Sensory information delivered to the solitary nucleus come from axons from where?
Other than general sensation, neurons with cell bodies located in the geniculate ganglion also carry what kind of information?
Where do sensory neurons with cell bodies located in the geniculate ganglion terminate?
What part of the tongue do the neurons in the chorda tympani carry info from?
What structure divides the tongue into an anterior 2/3 and posterior 1/3?
T/F: axons in the motor nucleus of the facial nerve that travel throught the geniculate ganglion are upper motor neurons.
False; these are lower motor neurons
Which cerebral hemisphere sends information to the motor nucleus of CN VII?
What part of the face receives motor info ONLY from the contralateral cortex?
T/F: the reticular formation sends info to motor nucleus, of CN VII.
Where do preganglionic parasympathetic fibers from the superior salivatory nucleus synapse?
either the pterygopalatine ganglion or the submandibular ganglion.
What kind of fibers from the superior salivatory nucleus synapse in the pterygopalatine ganglion?
Postganglionic fibers in the parasympathetic pathway of CN VII supply several gland. What specific glands were mentioned in class?
lacrimal, submandibular, sublingual and small glands in the oral and nasal cavities.
What is the apparent origin of the Facial nerve?
laterally in the sulcus between the pons and medulla oblongata; near the cerebellopontine recess
Before exiting the CNS, fibers from the motor nucleus of the facial nerve travel where?
posteriorly and arch around the abducens nucleus
What two roots are present at the apparent origin of CN VII
Motor root and intermediate nerve/root
what is another name for the motor root of the facial nerve?
facial nerve proper
What kind of fibers are carried by the intermediate nerve of CN VII?
sensory and parasympathetic
Upon exiting the CNS, both roots of CN VII travel together and enter what opening?
internal acoustic meatus
Where is the internal acoustic meatus located?
the petrous part of the temporal bone
What nerve comes off the geniculate ganglion and travels anteriorward?
the greater petrosal nerve