Cranial Nerves Origin and Course

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created 4 years ago by stingraygecko
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updated 4 years ago by stingraygecko
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1

olfactory

fibers arise from olfactory epithelium and run through cribiform plate foramina (ethmoid bone) to the olfactory bulb.

2

optic

fibers arise from retina of eye, pass through optic canal of sphenoid bone, partially cross over at the optic chiasma, continue to the thalmus to the primary visual cortex.

3

oculomotor

fibers emerge from the ventral midbrain and exit the skull via the superior orbital fissure.

4

trochlear

fibers emerge from midbrain and exit the skull via the superior orbital fissure.

5

mandibular

fibers from this division of the trigeminal nerve pass through the foramen ovale of the sphenoid bone.

6

maxillary

fibers from this division of the trigeminal nerve pass through the foramen rotundum of the sphenoid bone.

7

opthalmic

fibers from this division of the trigeminal nerve pass through the superior orbital fissure.

8

abducens

fibers from this division of the trigeminal nerve pass through the superior orbital fissure.

9

facial

fibers leave the pons and travel through the temporal bone via the external acoustic meatus, exiting the skull via the stylomastoid foramen to reach face.

10

vestibulocochlear

fibers run from inner ear equilibrium and hearing apparatus (in temporal bone) through the internal acoustic meatus to enter pons.

11

glossopharyngeal

fibers emerge from medulla oblongata and leave skull via jugular foramen to run to throat.

12

vagus

fibers emerge from medulla oblongata and pass through jugular foramen and descend through neck into thorax and abdomen.

13

accessory

fibers arise from superior aspect of spinal cord, enter the skull, and then travel through jugular foramen to reach muscles of neck and back.

14

hypoglossal

fibers arise from medulla oblongata and exit from skull via hypoglossal canal to travel to tongue.