pns (ch 13) Flashcards
(74 cards)
what is a nerve
a collection of axons outside of the CNS
characteristics of nerves
repairable
layers of collagen - tough
endoneurium is found…
around each axon
perineurium is found…
around each fascicle
epineurium is found…
around entire nerves
function of BVs
carrying O2 and nutrients
removing CO2 and wastes
olfactory n.
#
sensory for:
through:
I. (nerves to bulb to tract)
smell
olfactory foramina
optic n.
#
sensory for:
through:
II. (nerves to chiasm to tract)
sight
optic canal
oculomotor n.
#
motor to:
through:
III.
eye (4/6 extraocular eye muscles)
superior orbital fissure
trochlear n.
#
motor to:
through:
IV. (pulley)
superior oblique of eye
superior orbital fissure
trigeminal n.
#
sensory for:
motor to:
through:
V. (three twins)
face
chewing muscles
3 divisions
divisions of the trigeminal n.
ophthalmic
maxillary
mandibular
ophthalmic division
sensory for:
through:
eye/above it
superior orbital fissure to supraorbital foramen
maxillary division
sensory between:
through:
eyes and mouth
foramen rotundum to infraorbital foramen
mandibular division
sensory below:
motor to:
through:
mouth
chewing muscles
foramen ovale to mandibular foramen to mental foramen
abducens n.
#
motor to:
through:
VI. (abducts)
lateral rectus of eye
superior orbital fissure
facial n.
#
motor to:
sensory to:
through:
VII.
face muscles - expression, tear gland, salivary glands, nasal mucosa
anterior tongue - taste
internal acoustic meatus and stylomastoid foramen
vestibulocochlear n.
#
sensory for:
through:
VIII. (vestibule and cochlea)
balance and hearing
internal acoustic meatus
glossopharyngeal n.
#
sensory for:
motor to:
through:
IX. (tongue and throat)
posterior tongue (taste), BVs in neck
swallowing muscles
jugular foramen
vagus n.
#
sensory and motor to:
through:
X. (wandering)
anterior body cavity organs
(parasympathetic rest and digest: >90%)
jugular foramen
accessory n.
#
motor to:
through:
XI.
sternocleidomastoid and trapezius
jugular foramen
hypoglossal n.
#
motor to:
through:
XII. (below tongue)
tongue
hypoglossal canal
spinal nerves arise from…
roots
how many pairs of spinal nerves are there
31
