Concept F - functional nervous system

provide nerve fibers to/from the organ

innervate

fiber carries impulses TOWARDSSSSS the CNS “arrives”

afferent

fiber carries impulses AWAYYYY from the CNS “exits”

efferent

skeletal muscle (voluntary)

→ sensory, joint, tendons

somatic

organs

visceral

sensory and motor

list the divisions of the functional nervous system

exchange of info from one neuron to the other

what is a synapse?

carries info

what is a presynaptic neuron?

receives the info

what is a postsynaptic neuron?

skin sensation

muscle stretch

your position in space

somatic afferent

voluntary movement aka skeletal muscle

somatic efferent

posterior root ganglion

where is the somatic afferent located?

anterior horn

where is the somatic efferent located?

direct communication between sensory and motor neuron

what is a monosynaptic reflex?

interneuron facilitates sensory-motor communication

what is a polysynaptic reflex?

both CNS and PNS divisions of the nervous system

somatic reflexes include what…?

stomachache

cramps

nausea

visceral afferent

posterior ganglion root

where is posterior visceral afferent located?

depends on division. Could be sympathetic or parasympathetic

where is the visceral efferent located?

smooth muscle, cardiac muscle, and some glands

visceral efferent

fight or flight response

needs a 2-neuron system

sympathetic nervous system

rest and digest

needs a 2-neuron system

parasympathetic nervous system

lateral horn from vertebrae T1-L2

where are the pre synaptic bodies in the visceral efferent nervous system located?

in ONE of the ganglions along the sympathetic trunk

where are the postsynaptic cell bodies located in the visceral efferent nervous system?

in brainstem nucleai from vertebrae S2-S4

where are the presynaptic cell bodies located in the parasympathetic nervous system?

located close to the target organ or within the wall of the target organ

where are the postsynaptic cell bodies located in the parasympathetic nervous system?

CN 3, 7, 9, 10

what cranial nerves are a part of the paraympathetic nervous system?

no bc it’s not 3, 7, 9, 10. is is a part of the sympathetic nervous system located in vertebrae T1-L2

is CN6 a part of the parasympathetic nervous system?