CN VIII name
Vestibulocochlear nerve
what does vestibulocochlear mean
small cavity; spiral snail-like; ear
CN VIII: sensory, motor or mixed?
mixed but MAINLY SENSORY
vestibulocochlear nerve: sensory: function?
equilibrium and hearing (judy says equilibrium is motor. book and notes say equilibrium is sensory.)
CN X name
vagus nerve
what does vagus mean
wandering; vagrant
CN X: sensory, motor mixed?
mixed
CN X: components/innervates?
from pharynx, larynx, thoracic to abdominal viscera
Vagus nerve: sensory: function?
taste, touch, pain, temperature; monitoring blood pressure, monitory carbon dioxide in blood; sensations from visceral organs in thorax and abdomen
CN X: mixed fibers innervate parasympathetic fibers to ALL organs except the ____________ ___________.
adrenal glands
CN VIII: components/innervates?
inner ear
how many branches does the vestibulocochlear nerve have?
2; vestibular (equilibrium) and cochlear (hearing)
CN XI name
accessory nerve
how does CN XI differ from all other CNs?
it originates from both the brain stem and the spinal cord
accessory nerve mean?
assisting
CN XI: cranial root: motor, sensory, mixed?
motor
CN XI: spinal root: motor, sensory, mixed?
mixed but MAINLY MOTOR
accessory nerve: spinal root: motor to what muscles?
trapezius and SCM
accessory nerve: cranial root: serves what function?
rapidly joins the vagus nerve and serves the same function as other vagal nerve fibers
the accessory nerve exits the cranium through what foramen?
jugular
ventral root (anterior) =
motor - efferent
dorsal root (posterior) =
sensory - afferent
dorsal root ganglion =
cell bodiesd of sensory neurons
after exiting the vertebral column the roots merge to form a ________ _________ __________.
MIXED SPINAL NERVE.
very shortly after exiting the vertebral column, the mixed spinal nerve forms several branches, each of which is called a ________.
ramus.
ramus = branch; all are __________ nerves.
mixed
what is the posterior branch of the ramus?
dorsal ramus
what is the anterior branch of the ramus?
ventral ramus
do dorsal rami join together to form plexuses?
no; only ventral rami
some of the branches braid together in the ventral rami and form a nerve ________.
plexus; NOT ALL DO.
ONLY _______ rami join together to form plexuses.
ventral (anterior)
dorsal ramus = somatic motor and sensory fibers diverge into smaller nerves which innnervate what?
the skin and DEEP muscles of the head, neck and back.
what is a plexus?
braiding, or networking of ventral rami