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Neuroscience 3 > ANS > Flashcards

ANS Flashcards

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

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

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
Q

SNS on Viscera

A

heart lungs gut kidneys liver bladder reproductive organs

26
Q

SNS on lungs

A

bronchodilation

27
Q

PNS Fx

A

conserve energy use and build energy stores

28
Q

PNS on eyes

A

constriction

29
Q

PNS on glands

A

activation salivary and lacrimal

30
Q

PNS on HR

A

slowing HR vasodilation

31
Q

PNS on lungs

A

broncoconstriction

32
Q

brainstem pregang nuclei

A

EW nu sup and inf salivary nu nu ambiguous dorsal motor nu of vagus

33
Q

sacral pregang nu

A

lateral horns

34
Q

EW nu go to

A

ciliary muscles for pupil constriction

35
Q

Sup and inf salivary nu go to

A

salivary and lacrimal glands

36
Q

nu ambiguous go to

A

cardiac muscles slowing HR

37
Q

sacral pregang nu go to

A

colon, rectum and for vasodilation lungs for bronchodilation gut for increased motility and digestion

38
Q

Dual innervation of ANS

A

most structures on innervated by SNS and PNS

39
Q

dual innervation exceptions in ANS

A

sweat glands erector pili most blood vessels adrenal medulla

40
Q

How do the single innervated things regulate?

A

down regulation of SNS

41
Q

SNS vs PNS responses

A

SNS is longer lasting bc

divergence of pregang

longer unmyelinated

slower inactivation

presence of NE and Epi

42
Q

accelerated parasympathetic response can be activated during

A

paradoxical fear - no way to win or escape

43
Q

ANS controlled by

A
  • Hypothalamus
  • Brainstem nuclei
  • Amygdala and other limbic structures
  • Medial prefrontal cortex
  • Insular cortex
44
Q

ANS regulated by

A
  • Baroreceptors
  • Chemoreceptors
  • Osmoreceptors
  • Thermoreceptors
45
Q

ANS pathway

46
Q

Affarent input serves for ANS

A
  • 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
Q

Afferent input visceral pain

A

Some of the 2⁰ neurons in the dorsal horn that receive visceral sensory input are part of the anterolateral system

REFERRED PAIN

•Travel to VPL of thalamus and then projects to insular cortex for integration

48
Q

Modulation of ANS

A

Central autonomic network

insular cortex

medial prefrontal cortex

hypothalamus

hippocampal formation, amygdala

49
Q

Central autonomic network modulation

A

•accounts for integration of visceral input with input from other sensory modalities and from higher cognitive centers

50
Q

insular cortex modulation

A

primary visceral sensory area

51
Q

medial frontal cortex modulation

A

primary visceral motor area

  • Example activity:
  • Blushing in response to embarrassing experiences
  • Vasoconstriction and pallor in response to fear
  • Autonomic responses to sexual situations
52
Q

hypothalamus modulation Fx

A

•Controls blood flow, regulates energy metabolism, regulates reproductive activity, and coordinates responses to threatening conditions

53
Q

hypothalamus modulation projections

A

reticular formation

PNS pregang nerves

brainstem nerves

PNS and SNS nuerons

54
Q

Hippocampal formation, amygdala modulation

A

pulls from memories and emotions

55
Q

Enteric system controls

A
  • 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
Q

Enteric system neurotransmitters

A

90 percent of seretonin used

50 percent of dopamin used

57
Q

what modulates enteric system

A

SNS and PNS

but also opperates independently of SNS and PNS

Neuroscience 3 (4 decks)

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