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Neuroscience 3 > ANS > Flashcards

ANS Flashcards

(57 cards)

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1
Q

SNS

A

fight or flight

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2
Q

PNS

A

rest and digest

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3
Q

Enteric Nervous

A

gastrointestinal

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4
Q

ANS afferent source of descending pathway (mainstructure) and receiving Affarent info (structure)

A

Hypothalamus for both

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5
Q

Somatic nervous system major receiving afferent (structure) and major souce of decending info (structure)

A

thalamus recieve

decending cerebrum

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6
Q

ANS vs vs CNS and PNS

A

has 2 neurons

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7
Q

How does ANS get to structures

A

it exits the ventral horn and then synapses with ganglia and then goes to structure

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8
Q

synapse in ANS vs others

A

it has electrical synapsing

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9
Q

Preganglionic and postganglionic fibers are

A

pre are lightly myelinated post are not myelinated

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10
Q

sympathetic fibers are found

A

T1-L3 thoracolumbar ganglia is closer to spinal cord

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11
Q

parasympathetic are found

A

CN 3,7,9,10 S2-4 craniosacral ganglia is closer to target effector

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12
Q

SNS neurotransmitter

A

ACh pre NE post

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13
Q

PNS neurotransmitter

A

ACh pre and post

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14
Q

SNS Fx 4 es

A

Exercise Emergency Excitement Embarrassment

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15
Q

SNS Fx to eyes

A

pupil dilation eyelid retraction

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16
Q

SNS on glands

A

inhibition of salivation and lacrimation

stim of sweat gland

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17
Q

SNS on CVS

A

vasoconstriction increase HR and CO piloerection

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18
Q

SNS on hair

A

Piloerection

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19
Q

SNS on neural

A

reduction in neural output

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20
Q

SNS on digestive tract

A

reduction

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21
Q

SNS on hormones

A

hormones released Epi and NE Glucagon

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22
Q

SNS pregang originate from

A

lateral horns

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23
Q

3 routes of SNS

Study These Flashcards
A

Travel to sympathetic trunk via white communicating rami and synapse immediately with postganglionic neurons at the same spinal cord level - BV and skin/LE Travel to sympathetic trunk via white communicating rami and either ascend or descend to synapse in more cranial or caudal ganglia - BV and skin/LE Continue through trunk without synapsing, and later synapse with postganglionic neurons in prevertebral ganglia - go to organs

24
Q

SNS for postgang

Study These Flashcards
A

they diverge and go to multiple target tissues

single pre gang will have multiple targets allows for SNS to activate targets in response to stress

25
SNS on Viscera
heart lungs gut kidneys liver bladder reproductive organs
26
SNS on lungs
bronchodilation
27
PNS Fx
conserve energy use and build energy stores
28
PNS on eyes
constriction
29
PNS on glands
activation salivary and lacrimal
30
PNS on HR
slowing HR vasodilation
31
PNS on lungs
broncoconstriction
32
brainstem pregang nuclei
EW nu sup and inf salivary nu nu ambiguous dorsal motor nu of vagus
33
sacral pregang nu
lateral horns
34
EW nu go to
ciliary muscles for pupil constriction
35
Sup and inf salivary nu go to
salivary and lacrimal glands
36
nu ambiguous go to
cardiac muscles slowing HR
37
sacral pregang nu go to
colon, rectum and for vasodilation lungs for bronchodilation gut for increased motility and digestion
38
Dual innervation of ANS
most structures on innervated by SNS and PNS
39
dual innervation exceptions in ANS
sweat glands erector pili most blood vessels adrenal medulla
40
How do the single innervated things regulate?
down regulation of SNS
41
SNS vs PNS responses
SNS is longer lasting bc divergence of pregang longer unmyelinated slower inactivation presence of NE and Epi
42
accelerated parasympathetic response can be activated during
paradoxical fear - no way to win or escape
43
ANS controlled by
* Hypothalamus * Brainstem nuclei * Amygdala and other limbic structures * Medial prefrontal cortex * Insular cortex
44
ANS regulated by
* Baroreceptors * Chemoreceptors * Osmoreceptors * Thermoreceptors
45
ANS pathway
46
Affarent input serves for ANS
* Feedback input via solitary nucleus for local autonomic reflexes * Inform higher integrative centers of more complex patterns of stimulation that may signal danger and/or may require more multi-system control
47
Afferent input visceral pain
Some of the 2⁰ neurons in the dorsal horn that receive visceral sensory input are part of the anterolateral system ## Footnote REFERRED PAIN •Travel to VPL of thalamus and then projects to insular cortex for integration
48
Modulation of ANS
Central autonomic network insular cortex medial prefrontal cortex hypothalamus hippocampal formation, amygdala
49
Central autonomic network modulation
•accounts for integration of visceral input with input from other sensory modalities and from higher cognitive centers
50
insular cortex modulation
primary visceral sensory area
51
medial frontal cortex modulation
primary visceral motor area ## Footnote * Example activity: * Blushing in response to embarrassing experiences * Vasoconstriction and pallor in response to fear * Autonomic responses to sexual situations
52
hypothalamus modulation Fx
•Controls blood flow, regulates energy metabolism, regulates reproductive activity, and coordinates responses to threatening conditions
53
hypothalamus modulation projections
reticular formation PNS pregang nerves brainstem nerves PNS and SNS nuerons
54
Hippocampal formation, amygdala modulation
pulls from memories and emotions
55
Enteric system controls
* Exerts control of gastrointestinal system through neuronal system embedded in the lining of GI organs * Peristalsis * Segmentation – all over the place kind of like a washing a machine * Hormone secretion * Gastrin, secretin
56
Enteric system neurotransmitters
90 percent of seretonin used 50 percent of dopamin used
57
what modulates enteric system
SNS and PNS but also opperates independently of SNS and PNS

Neuroscience 3 (4 decks)

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