Autonomic Nervous System

what nervous system is used in concious control and is voluntary?

sensory nervous system

what nervous system is unconsius control and is unvoluntary?

autonomic nervous system

what is the effector of the SNS?

skeletal nervous system

what is the effector of the ANS?

cardiac and smooth muscle and glands

how many neurons are in the ANS?

2

what are 2 divisions of the ANS?

parasympathetic and sympathetic

what is the parasympathetic nervous system is called what?

rest and digest

where is the origin if the presynaptic neruron body of the sympathtic nervous system?

thoracolumbar region of spinal cord

where is the origin if the presynaptic neruron body of the parasympathtic nervous system?

brain and sacral spinal cord (CN III, VII, IX, X)

what is the length of the sympathtic presynaptic fiber?

short

what is the length of the sympathtic postsynaptic fiber?

long

what is the length of the parasympathtic presynaptic fiber?

long

what is the length of the parasympathtic postsynaptic fiber?

short

what is the location of the ganglia in the sympathetic nervous system?

sympathetic chain ir prevertebral ganglia (celia truck, SMA, IMA)

what is the location of the ganglia in the parasympathetic nervous system?

walls of the organ where you are sending them

where does the synapsing occur in the nervous system?

ganglia

what does the parasympathetic nervous system innervate?

internal organs

what does the parasympathtic nervous system do?

slow down all functions but increases digestion

what does the sympathtic nervous system do?

increase down all functions but slow down digestion

what organs does the parasympathetic nervous system innervate?

heart, lungs, foregut, and midgut

where are the parasympathetic presynaptic neuron cell bodies located? CN and vertebral levels

CN III, VII, IX, X and S2-S4

what nerve innervates the heart, lungs, liver, gallbladder, stomach, small intestine, pancreas, proximal ½ of large intestine?

vagus nerve

what spinal cord level does the neurons of presynaptic parasympathetic nervous system originate from?

S2-S4

what exits the ventral rami of the neurons of presynaptic parasympathetic nervous system?

pelvic splanchnic nn.

where does the splanchnic nn. synapse

ganglia near/at effector organ

what organs do the parasympathetic postsynaptic fibers innervate?

urinary bladder, ureters, reproductive organs, distal large intestine, and pelvic viscera

what does the sympathetic nervous system innervate?

internal organs and mm.

where are the presynaptic neuron cell bodies of the symapthetic nervous system located?

thoracocolumnar region of spinal cord

where is the synapse between the pre and post synaptic neurons in the sympathetic nervous system?

paravertebral ganglia on sympathetic chain (above diaphragm) and off synaptic chain on aorta

what is the chain that is on the either side of the spinal column that has ganglia where nerves synapse?

sympathetic chain

what vertebral level does the intermediate horn come from?

T1-L2

what is the paravertebral ganglia joined to spinal nerve by what?

white and grey rami communuicantes

what do the white rami carry to the sympathetic chain?

presynaptic fibers

what do the grey rami carry to leave the sympathetic chain?

postsynaptic fibers

presympathetic fibers exit the spinal cord through what?

ventral spinal root

how many diffrerent ways can sympathetics use presynaptic fibers to enter the sympathetic chain?

3

in synaptic pathways presynaptic fibers enter the sympathetic chain through what?

white rami communicantes

in synaptic pathways postsynaptic fibers leave the sympathetic chain through what?

grey rami communicantes

presynaptic fibers synapse with the postsynaptoc neuron where?

same level, different level, not on the chain

when presynaptic fibers synapse with postsynaptic fibers not on the synaptic chain leave as what?

splanchnic nerves

when presynaptic fibers synapse with postsynaptic fibers not on the synaptic chain leave as splanchnic nerve to go where?

GI tract

what does the adrena medulla produce?

epiniephrine and nonepinephrine

what does the sympathetic nervous system do?

dilates pupils, accelerates heart rate, dialates bronchi, inhibits digestion, stimulates ejaculation

what does the parasympathetic nervous system do?

constricts pupils, stimulates salivary flow, decreases heart rate, constricts bronchi, stimulates digestion, stimulates erection

what do you call it whe internal organs have pairs of receptors but we can’t conciously realize it so it feels like its coming from a surface area? (visceral pain may radiate along somatic pathways)

reffered pain

what is a example of reffered pain?

appenditis