CN I function
Smell
CN I lesion
Loss of smell
CN II function
Sight
CN II lesion
Loss of sight
CN III nuclei
Occulomotor nuclear complex
CN III function
Light, accommodation reflexes (all other eye movements)
CN III lesion
Diplopia,myardriasis,ptosis,lateral strabismus
CN IV nuclei
Under inferior collicilus
CN IV function
Innervation of superior oblique eye muscle
CN IV lesion
Inability to look down + in
CN V nuclei
Spinal tract of trigeminal, chief sensory nucleus, mesencephalic, motor nucleus
CN V function
Motor mastication P+T - face / D.S - face
CN V lesion
Inability to chew, facial anesthesia, trigeminal neuralgia
CN VI nuclei
Abducens nucleus
CN VI function
Abducts eyeball (lateral rectus)
CN VI lesion
Medial strabismus, diptopia
CN VII nuclei
Facial, nucleus, solitary nucleus, superior salivary nucleus,
CN VII function
Facial expression, sublingual glands
CN VII lesion
Bell’s palsy
CN VIII nuclei
Vestibular nuclei + cochlear nuclei
CN VIII function
Balance, equilibrium, hearing
CN VIII lesion
Vertigo, nystagmus, vomiting, loss of hearing
CN IX nuclei
Solitary nucleus, nucleus ambiguous, inferior salivary nucleus
Cn IX function
Taste,sensory, soft palate, motor to sylopharyngeal, parotid salivary gland
