7 (C) SNS ANS Flashcards

1
Q

ANS is influenced by the hypothalamus how (position)

A

Rostrally

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2
Q

Visceral organs receive both what

A

CNS / PNS

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3
Q

PNS visceral motor division have what fibres to what structures

A

Efferent motor fibres to smooth muscle

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4
Q

ANS is only carried via …..

segments

A

T1 - L2

S2 - S4

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5
Q

What part of the spinal cord does the PNS travel down

A

Lateral grey horn

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6
Q

Preganglionic neurone is found in what?

A

CNS

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7
Q

Pastganglionic neurone + autonomic ganglion is found in what?

A

PNS

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8
Q

SNS flows from what segments

A

T1 - L2

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9
Q

What type of effect does the SNS have

A

Widespread

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10
Q

What type of outflow is the PNS

A

Craniosacral outflow

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11
Q

What CN are involved in the PNS

A

CN 3
CN 7
CN 9
CN 10

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12
Q

is the organ plexuses post / pre ganglionic

A

Post

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13
Q

What type of effect is the PNS

A

Localized

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14
Q

The pelvic splanchnic nerves are ….

segments

A

S2 - S4

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15
Q

The pelvic splanchnic nerves do what to the bladder / rectum / penis?

A

Open bladder

Empties rectum

Erections

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16
Q

SNS transmitter pre ganglionic

SNS transmitter post ganglionic

A

AcH

NE // epinephrine

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17
Q

How does the SNS affect the adrenal medulla

A

Preganglionic go straight to the adrenal medulla and directly release NE into BS

NO post ganglionic fibres used

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18
Q

the Cardiopulmonary system synapse at what ganglia

what level is this at

A

Paravertebral ganglia at entry

*first barrier of nuclei

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19
Q

the digestive system synapse at what ganglia

what level is this at

A

DOES NOT SYNAPSE AT SYMPATHETIC TRUNK

Goes to prevertebral ganglia for synapse // adrenal medulla

(*2nd barrier of nuclei)

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20
Q

how does the fibres for face / gland / eyes travel in the SNS

A

Ascend / descend to another ganglion in trunk

21
Q

The White Ramus Communicans have what type of fibres

What levels do they come from?

A

Myelinated preganglionic SNS fibres

T1 - L2

22
Q

Grey Ramus Communicans have what type of fibre?

What levels do they come from?

A

Unmyelinated postganglionic fibres

All levels of cord

23
Q

Voiding

A

Drain away // discharge

24
Q

Heart + respiratory is affected by what levels of the SNS

A

T2 - T4

25
Q

What does the SNS have on bronchioles

A

Bronchodilation

26
Q

What level of SNS affects micturition (pee)

A

T11 - L2

27
Q

What does the SNS have on the bladder

A

Prevents voiding = No wee

28
Q

What level of PNS affects the bladder?

What does it do?

A

S2 - S4

Induces voiding = pee

29
Q

What nerve is responsible for somatic voluntary contraction of the external urethral sphincter

A

Pudendal nerve

30
Q

What nerve is not acquired in infants that is responsible for micturition

A

Pudendal nerve

31
Q

What muscle has stretch receptors in the bladder

A

Detrusor muscle

32
Q

What level of the SNS affects rectum emptying?

What does it do to the rectum

A

L1 - L2

Prevents rectum emptying

33
Q

Somatic voluntary contraction of the rectum is done via what nerve?

A

Pudendal nerve

34
Q

as a summary, cerebrum is responsible for the ANS of …

A

Emotional responses

35
Q

as a summary, the hypothalamus is responsible for the ANS of ….

A

Overall control + regulation

36
Q

as a summary, the brainstem centres is responsible for the ANS of …

A

Cardiovascular + respiratory + swallowing

37
Q

as a summary, the spinal cord centres is responsible for the ANS of …

A

Urination / defecation / erection / ejaculation

38
Q

What structure connects the hypothalmus / mamilliary bodies –> hippocampus

A

Fornix

39
Q

Function of the mamilliary bodies

A

Recollective memory

40
Q

What are major components of the basal nuclei / ganglia (3)

What are the other 2 components

A

Caudate Nucleus // Putamen // Globus Pallidus

Substantia Nigra // Subthalamic Nucleus

41
Q

Major commisure of the brain

A

Corpus Callosum

42
Q

Which component of the ventricular system is found a the diencephalon?

A

3rd ventricle

43
Q

Which component of the ventricular system is found a the Midbrain

A

Cerebral Aquaduct

44
Q

Which component of the ventricular system is found a the Pons

A

4th ventricle

45
Q

At which points do the ventricular system communicate with the subarachnoid space? (2 foramen)

A

foramen of Magendie // foramina of Luschka

46
Q

Foramina of Monro connects what

A

Lateral ventricles -> 3rd ventricle

*Interventricular foramina

47
Q

Foramina of Luschka connect what?

A

4th ventricle to subarachnoid space

48
Q

Cerebral aquaduct connect what?

A

3rd to 4th ventricle