Peripheral Nervous System

what is the CNS myelination?

oligodendrocyte

what is the PNS myelination?

schwann cell

what is the CNS soma location?

brain, spinal cord, retina

what is the PNS soma location?

rest of the body

what is the CNS neuron clusters?

nucleus

what is the PNS neuron clusters?

ganglion

what is the CNS axon bundles?

tract

what is the PNS axon bundles?

nerve

what is the CNS direction of communication?

integrate/process internal; command periphery

what is the PNS direction of communication?

report to central

sensory receptors

collect sensory stimuli

what are sensory receptors classified by

location - exteroceptors, interoceptors, proprioceptors

what are the general senses

touch, pressure, temperature, pain, balance, thirst, hunger, itch

prorioceptors

sense where body parts are in space

what are some body parts that help the proprioceptors to sense where body parts are in space?

muscle spindles, tendon organs, and joint kinesthetic receptors

where does the information from the proprioceptors go?

to the cerebellum

cranial nerves

contain sensory, motor, or both axons. cell bodies in brain, sensory organ, or ganglia. can be sensory, motor, or mixed

sensory cranial nerves

CN I olfactory, CN II optic, CN VIII vestibulocochlear

CN I olfactory

smell - cribriform foramina (ethmoid)

CN II optic

vision - optic canal (sphenoid)

CN VIII vestibulocochlear

hearing and equilibrium - internal acoustic meatus (temporal bone)

motor cranial nerves

CN III oculomotor, CN IV trochlear, CN XI abducens, CN XII hypoglossal, CN XI accessory

mixed nerves

CN VII facial, CN V trigeminal, CN IX glossopharyngeal, CN X vagus

CN VII facial

taste, saliva, cry - int. acoustic

CN V trigeminal

sense face, chew - sup. orbital fissure, f.

CN IX glossopharyngeal

taste, blood pressure, and O2, salivate, swallow - jugular foramen

CN X vagus

swallow, speak, sense viscera, ect - jugular foramen

dorsal

sensory

ramus

dorsal and ventral mixed

spinal cord segment

region where axons emerge

nerve plexus

nerve network of ventral rami

cervical plexus

neck

brachial plexus

upper limb

lumbar plexus-

-lower limb

sacral plexus

lower limb