HPHY 321 Lab 4: Cranial Nerves and Spinal Cord

Olfactory nerve (CN I)

Sense of smell

optic nerve (CN II)

the nerve that carries neural impulses from the eye to the brain

oculomotor nerve (CN III)

eye focus and movement, size of pupil

Trochlear Nerve (CN IV)

Really thin!

Motor to a single extrinsic eye muscle.

Trigeminal Nerve (CN V)

Motor to chewing muscles; sensory to face, oral, and nasal cavities.

trigeminal ganglion of the trigeminal nerve

Ophthalmic branch of the trigeminal ganglion (CN V1)

A

passes through superior orbital fissure

Maxillary branch of the trigeminal ganglion (CN V2)

B

passes through foramen rotundum

mandibular branch of the trigeminal ganglion (CN V3)

C

passes through foramen ovale

Abducent Nerve (CN VI)

Facial Nerve (CN VII)

goes in through internal acoustic meatus, comes out through stylomastoid foramen

vestibulocochlear nerve (CN VIII)

passes through internal acoustic meatus

glossopharyngeal nerve (CN IX)

passes trough jugular foramen

Vagus nerve (CN X)

passes through jugular foramen

Accessory Nerve (CN XI)

enters foramen magnum, exits through jugular foramen

Hypoglossal nerve (CN XII)

passes through hypoglossal canal

white matter of the spinal cord

gray matter of the spinal cord

anterior horn of gray matter

posterior horn of gray matter

lateral horn of gray matter

ventral root of the spinal cord

caries efferent motor

dorsal root of the spinal cord

carries afferent sensory

dorsal root ganglion of the spinal cord

contains cell bodies of afferent sensory neurons

spinal nerve of the spinal cord

dorsal ramus of the spinal cord

ventral ramus of the spinal cord

ramus communicans of the spinal cord

includes white and grey ramus communicans

sympathetic ganglion of the spinal cord

the ganglion where sympathetic pre-synaptic fibers synapse with post-synaptic sympathetic fibers

sympathetic trunk of the spinal cord

superior cervical ganglion of the spinal cord

most upper cervical ganglion

middle cervical ganglion of the spinal cord

in between superior and inferior cervical ganglion

inferior cervical ganglion of the spinal cord

bottom cervical ganglion

central canal of the spinal cord

CSF runs through it

anterior median fissure of the spinal cord

posterior median sulcus of the spinal cord

conus medullaris of the spinal cord

end of spinal cord

cauda equina of the spinal cord

horses tail

filum terminale of the spinal cord

central strand of connective tissue connecting conus medularis to coccyx