-
CN I
- Olfactory Nerve Pair
- Sensory
- Input to brain via Olfactory bulb and tract (stimuli from nose)
- Input interpreted in the uncus of each temporal lobe
-
CN II
- Optic Nerve Pair
- Sensory
- Input to brain via Optic Nerves, Optic Chiasma, and Optic Tracts
- Input interpreted by neurosn near the calcarine sulcus of each occipital lobe
-
CN III
- Oculomotor Nerve Pair
- Motor
- Controls 4 of the 6 external eye muscles
- Parasympathetic control over some smooth muscles (dilation, focusing on near/far)
-
CN IV
- Trochlear Nerve Pair
- Motor
- Controls one eye muscle
-
CN V
- Trigeminal Nerve Pair
- Both (sensory and motor)
- Originates at the Pons
- Three subdivisions, all in the face
- Ophthalmic, Maxillary and Mandibular subdivisions
- Motor works on masseter muscle
- Sensory carries sensations of pain, thermal light and deep touch from facial areas
-
CN VI
- Abducens Nerve Pair
- Motor
- Controls one eye muscle
-
CN VII
- Facial Nerve Pair
- Both (sensory and motor)
- Motor controls fascial expression/lacrimal glands (tears, parasympathetic)
- Sensory brings taste (gustatory sensation)
-
CN IX
- Glossopharyngeal Nerve Pair
- Both (sensory and motor)
- Supplies innervation to the pharynx and back of the tongue
- Parasympathetic control over largest salivary glands (parotids)
-
CN VIII
- Vestibulocochlear Nerve Pair
- Sensory
- Hearing/equilibrium
- Final interpretation of hearing is in the superior temporal gyrus of each temporal lobe
-
CN X
- Vagus Nerve Pair
- Both (sensory and motor)
- Longest cranial nerve
- Innervates thorax and abdominal structures
- 80% of its fibers are afferent (parasympathetic visceral component)
-
CN XI
- Spinal Accessory Nerve Pair
- Motor
- Innervates SCM and trapezius
-
CN XII
- Hypoglossal Nerve Pair
- Motor
- Tongue movements
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