Lecture 4 - ANS DSA Flashcards
what special senses are covered by somatic sensory
touch, hearting, equilibrium, and vision
what senses are covered by visceral sensory
taste and smell
what spinal root is responsible for referred cardiac pain
T1
What does the visceral motor division of the PNS control
smooth muscle, cardiac muscle, and glands
what function does visceral motor regulate
HR, BP, digestion, and urination
what sensations does the visceral afferent portion of the PNS regulate
stretch of organs, temperature, metabolic and chemical changes, and irritation
how is pain perceived when an organ is cut
there are no pain receptors, the pain is interpreted as chemical irritation or inflammation responses
what is visceral pain that is perceived to be of somatic origin
referred pain
how many neurons are typically involved of an ANS system
2; the adrenal medulla is a 1 nerve system
what are cells called which have their cell body in the CNS? periphery?
presynaptic or preganglionic; postsynaptic or postganglionic
what is the sympathetic metabolically? parasympathetic?
catabolic; anabolic
what does the sympathetic do with vasculature
vasoconstriction except coronary A
where does the sympathetic distribute to
everywhere that is vascularized
where is the parasympathetic distributed to
head, neck, body cavities, and genetalia
what controls all gland secretion
parasympathetic minus sweat glands
where is parasympathetic not found
body walls or limbs
what is the length of parasympathetic fibers? sympathetic
short postsynaptic; long post synaptic
where do sympathetic fibers meet up
sympathetic ganglia
how do sympathetic and parasympathetic branch
sympathetic is highly branched; parasympathetic has fewer. widespread v. local effect
what roots do sympathetic fibers come from
T1-L2/3
what neurotransmitters are released by postsynaptic symp/parasymp
symp - norepinephrine (adrenergic)
parasymp - acetylcholine (cholinergic)
where are the presynaptic symp neurons found
lateral or intermediolateral gray horn of cord
what is the sympathetic trunk ganglia also called
paravertebral or chain ganglia and they are on both sides of the cord
what carries the symp message from the cord to the sympathetic trunk
white rami communicans
what supplies the eye
T1-2
what supplies the head and salivary glands
T1-3
what supplies the heart lungs and esophagus
T4-6
what supplies the stomach liver gallbladder and pancreas
T7-9
what supplies the small intestine
T8-10
what supplies the appendix and colon
t10-11
what supplies the rectum, bladder, and uterus
t12-l2/3
what supplies the kidney
t11-l1
what supplies the suprarenal gland
t10-l1
what carries messages from the sympathetic trunk to the correct location
gray or post rami communicans
how does the sympathetic innervate things that are above t1-l2/3
the white communicans can go up and down spinal levels before they synapse
what is the role of the prevertebral ganglia? where is it
they are inhibitory neurons that inhibit muscles and glands in visceral organs; anterior to the verterbral column and only in abdomen and pelvis
what do sympathetic fibers to the adrenal glands connect to
directly to the medulla, they attach to chromaffin cells which release epi and norepi
what does the cranial outflow of the parasymp innervate
these are cranial nerves exiting the brainstem; organs of head, neck, thorax, and abdomen
what does the sacral outflow of the parasymp innervate
they emerge from s2-4, the supply and innervate the organs of the pelvis and lower abdomen
where are the bodies of the sacral outflow neurons located
visceral motor region of the gray matter
what do the sacral outflow nerves form upon leaving the spinal cord
pelvic slanchnic nerves
what distributes the sacral outflow
inferior hypogastric plexus
what is cranial nerve 10
vagus n
what innervates the GI
enteric nervous system; done by CN X (vagus) and pelvic splanchnic n
what are the majority of spalnchnic nerves
sympathetic, except pelvic splanchnic
what does the sympathetic use at pre/post synaptic neurons
ACh/Norepi
what does parasymp use at their pre/post synaptic neurons
ACh for both
