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Autonomic Nerv. system
Neuroscience
24
Medical
Professional
04/29/2011

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Cards

Term
All postsynaptic neuron cell bodies have what type of receptros
Definition
nictotini
Term
This modified SNS neuron has nicotinic recptors for it postsynaptic receptor
Definition
adrenal medulla
Term
Sweat glands use what type of receptors
Definition
muscarinic. even though they are sympathetic
Term
post synaptic PSNS
Definition
muscarinic receptor
Term
majority of SNS neurons lie where
Definition
interomedial cell column (gray horn)
Term
These two diseases destroy pre synaptic SNS neurons
Definition
Syringomyelia and MS
Term
where can the pre synaptic PSNS neurons be found?
Definition
white/gray border
Term
what is the major pathway for connecting the hypothalamus to the spinal ANS
Definition
DLF
Term
what is the function of the brainstem reticular formation?
Definition
they receive afferents from the hypothalamus and spinal cord
Term
How can SNS cause both smooth m. contract and relax?
Definition
it inhibits the PSNS from initiating detrusor contraction

it causes constrictions of the internal urethral sphincter
Term
what specifically inhibits the psns?
Definition
the postganglionic SNS inhibits PRE gang PSNS via ALPHA 2 receptors
Term
Specifically, how does the SNS inhibit the detrusor muscle
Definition
BETA 2
Term
How does the SNS constrict the internal urethral sphincter?
Definition
ALPHA 1
Term
What center inhibits the SNS to release inhibition on the Int. ur sphincter and activate the PNS
Definition
Pontine micturition center
Term
higher brain centers inhibit somatic neurons where? and to do what?
Definition
Onuf's nucleus (s2-4)
inhibit contraction of external urethral sphincter
Term
what happens to the bladder upon injury ABOVE the pons?
Definition
uninhibited bladder
Term
How does someone have a spastic bladder?
Definition
UMN lesion above sacral segments

No control over external urethral sphincter
Term
Flaccid bladder causes
Definition
LMN at sacral level or cauda equina level no afferent or efferent sent to bladder
Term
This system controls emission?
Definition
Sympathetic
Term
this controls ejaculation
Definition
somatic
Term
what type of erections occur if injury is above lumbar levels?
Definition
reflexive erections
Term
where is the ejaculation center in the spinal cord?
Definition
mid-lumbar levels
Term
This inhibits psychogenic erections
Definition
disruption of CNS afferents
Term
Bilateral lesions of the prefrontal cortex or ant. cingulate gyrus causes what?
Definition
incontinence of bladders and bowels
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