Cranial nerves Flashcards
CNI
olfactory
sensory
cribriform plate/cerebrum
chemoreceptors/olfactory bulbs and tracts
CNII
optic
sensory
optic foramina/thalamus, cerebrum
vision; 2 nerves unite -> optic chiasma, optic tracts to brain
CNIII
oculomotor
1o motor
superior orbital fissure/mesencephalon
to 4 of 6 muscles that move eyeball; constricts iris, focus lens
CNIV
trochlear
mixed 1o motor
superior orbital fissure/mesencephalon
moves eyeball; small nerve
CNV
trigeminal
mixed
sup orb fissure, foramen rotundum, foramen ovale, all off pons
three roots
trigeminal roots
opthalmic (eye, upper face)
maxillary (cheeks, upper jaw, nose)
mandibular (lower jaw; motor (chewing)
CNVI
abducens
mixed
sup orb fissure/pons
moves eyeball
CNVII
facial
mixed
stylomastoid foramen and internal acoustic meatus/pons
2 branches off pons-facial expression, tears, taste, salivary glands
CNVIII
vestibulocochlear(auditory/acoustic)
sensory
int. acoustic meatus/pons, medulla oblongata
comprised of 2 branches
vestibulocochlear branches
cochlear branch-hearing
vestibular branch-equilibrium/balance
CNIX
glossopharyngeal
mixed
jugular foramen/pons, medulla obl.
swallowing, salivary gland; taste; carotid bodies in carotid sinuses
CNX
vagus
mixed
jug foramen/med obl
swallowing/speaking/ visceral muscle, resp tract, lungs, heart ,esophagus, longest nerve
CNXI
accessory
1o motor
jug foramen/med obl/spinal cord
muscles of head, neck, shoulder; swallowing
CNXII
hypoglossal
mixed 1o motor
hypoglossal canal/med obl
tongue
