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20 Cards in this Set

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geniculocalcarine tract
optic radiation; fancy name for projection of lateral geniculate cells to the primary visual cortex in the calcarine fissure.
primary visual cortex location
calcarine fissure in occipital lobe
C.N. I
Olfactory nerve; sensory nerves are in nasal mucosa, course to olfactory bulb through cribiform plate. Olfactory bulb cells then project to olfactory cortex (not to thalamus!) SENSORY ONLY
C.N. II
Optic Nerve; SENSORY ONLY
-Retina sensory receptors
-Enter skull via optic foramen
-Optic chiasm crossover
-Optic tract to lateral geniculate body of thalamus;
Project as optic radiation to primary visual cortex in calcarine fissure of occipital lobe.
C.N. III
Occulomotor; MOTOR ONLY
goes anteriorly from midbrain through superior orbital fissure to innervate 4 muscles of eye; superior, inferior and medial rectus, and inferior oblique.
-Delivers preganglionic autonomic fibers to ciliary ganglion
C.N. IV
Trochlear; MOTOR ONLY;
from dorsal midbrain, goes anteriorly to pass through superior orbital fissure to innervate one extraocular muscle, superior oblique.
trigeminal nerve branches
opthalmic - sensory
maxillary - sensory
mandibular - mixed
C.N. V
Trigeminal Nerve
levator palpabrae innervation
ciliary ganglion from occulomotor nerve and occulomotor c.n. III
Opthalmic Branch of C.N. V
V1
origin: upper face
passes through: superior orbital fissure
goes to the pons
Maxillary nerve
C.N. V2 (2nd branch)
Sensory: inferior eyelid and down to maxilla.
Passes through foramen rotunda;
Sensory info to trigeminal ganglia, ultimately pons.
Mandibular branch
C.N. V3
MIXED NERVE
sensory info: from lower jaw/face;
passes through foramen ovale to trigeminal ganglia;
motor info: from trigeminal ganglia through foramen ovale to motor jaw muscles of mastication.
C.N. VI
Abducens nerve.
Motor Only; innervates lateral rectus, extraocular eye muscle.
Origin: below trigeminal nerve from lower pons.
Passes through: superior orbital fissure
C.N. VII
Facial Nerve
-both sensory and motor!
origin: pons
sensory: senses taste from anterior 2/3 of tongue
motor: innervates facial expression muscles.
Goes through: internal acoustic meatus
C.N. VIII
Acoustic nerve, aka Vestibulocochlear
sensory only: senses hearing and equilibrium info in cochlea, semicircular canals, takes it to pons.
Goes through: internal acoustic meatus
relays audition impulses to medial geniculate body on thalamus, auditory cortex in temporal lobe.
ciliary ganglion
receives parasympathetic fibers from edinger-westphal nucleus in midbrain;
upon synapse here, ciliary nerves innervate intrinsic ciliary eye muscles and levator palpabrae, eyelid opener.
branch of occulomotor nerve III
C.N. IX
Glossopharyngeal
Both Sensory/Motor
Sensory: taste info from posterior 1/3 of tongue;
Motor: innervates pharynx muscles
Origin: Medulla
goes through: jugular foramen
C.N. X
Vagus Nerve
both Sensory and Motor
Sensory: info from neck, thorax, abdomen
Motor: innervates palate/pharynx/larynx
Goes through: jugular foramen
C.N. XI
Spinal Accessory
Motor only
Innervates pharynx/larynx/neck/trapezius muscles.
goes through: jugular foramen
Cranial Component: medulla
Spinal Component: upper cervic. rootlets
C.N. XII
Hypoglossal nerve
Motor only
origin: medulla
innervates: tongue muscles