Autonomic Nervous System Flashcards Preview

Clinical Neuroscience weeks 1-3 > Autonomic Nervous System > Flashcards

Flashcards in Autonomic Nervous System Deck (34):
1

Anatomic difference between somatic motor system and autonomic?

Somatic motor system = lower motor neuron sends its axon to directly innervate its target organ.

Autonomicefferent system is comprised of two efferent neurons. A preganglionic neuron and its fiber and a postganglionic neuron and its fiber.

2

Preganglionic neurotransmitter of both the symapthetic and parasympathetic systems is

Ach

3

Neurotransmitter for postganglionic parasympathetic

Ach

4

Neurotransmitter for post-ganglionic sympathetic

Norep, unless you are talking about sweat glands or erector pili for hair

5

Adrenal gland exception?

Innervated directly by preganglionic Ach. KNOW

6

Know autonomic functions on slide 7

ok

7

The main point of the autonomic NS is to provide rapid but short term responses to stimuli.

Regulation of things like temperature, metabolism, heart rate, and bp are generally managed over the long term by endocrine organs. Short term management is accomplished via autonomic system

8

Summarize the neurotransmitter situation between sympathetics and parasympathetics

Parasympathetics use ACh as pre and post ganglionic neurotransmitter

Sympathetics use ACh as the pre-ganglionic neurotransmitter and Norepinephrine as the post-ganglionic neurotransmitter. That is, unless we are referencing the erector pili or sweat glands which still respond to Ach as their postganglionic NT

Also note that the adrenals receicve direct pre-ganglionic ACh sympathetic innervation

9

Primary ANS neurons of origin lie where

Hypothalamus

10

Sympathetic nervous system secondary neurons lie where

intermediolateral gray matter of the T1-L3 Spinal cord segments. KNOW

11

Parasympathetic nervous sytem secondary neurons lie in what areas of the SC

Cranial Sacral

12

Sympathetic does what to the pupils?

Dilates them to give full vision
Parasympathetic cnstricts them so you can see close up

13

Parasympathetic and sympathetic on the glands

Parasympathetic- increased secretions, watery secretions

Sympathetic- decreased secretions, thick secretions

14

Constriction of the coronary arteries via the the sympathetic nervous system occurs via which receptor

alpha receptor

Beta receptors dilate

15

Alpha receptors

Constrict

16

Beta receptors

Dilate

17

Parasympathetic allows you to pop a wood, sympa lets you shoot

ok

18

Superior salivatory nuclei exits where

with cranial nerve VII....innervates lacrimal and salivary glands

19

Inferior salivatory nucleus exits where?

With CN IX...innervates parotid

20

Vagus nerve does what

Parasympathetic to the heart, lungs, and intestines.... decreases heart rate, constrict bronchial tree, dilate intestinal vessels, increase peristalsis.

21

Myenteric plexus mainly does what

regulates gut smooth muscle and motility

22

submucosal plexus

secretions

23

Myenteric plexus lies between longitudinal and circular muscle layer. submucosal plexus lies under circular layer

ok

24

Outflow of ANS regulated by

Amygdala and hypothalamus

25

Horner's syndrome

unilateral ptosis (eyelid droop) and meiosis (small pupil)

26

If you have lesion in the spinal cord or brainstem what kind of sweating manifestation would you expect?

A loss of sweating (anhidrosis) over the entire left side of the body below the lesion

27

If you had a peripheral lesion of the sympathetics serving the eye you would only expect loss of sweating on the

head and face on the side od the lesion

28

Sympathetics to the eye exit the sympathetic pathway where

T1-T2 nerve root

29

Baroreceptors provide information about blood pressure to what nucleus via what nerves

Nucleus solitarius via glossopharyngeal and vagus nerves

30

Chemoreceptors provide info on oxygen and co2 concentration in the blood to what nucleus via what nerves

nucleus solitarius via CN 9 and 10

31

Bladder fullness travels to thalamus and cortex via

spinothalamic tracts

32

very fullness of the bladder is sensed by mechanoreceptors where

trigone area, travels to thalamus and cortex via posterior columns

33

Sympathetics innervate teh detrussor and allow what

relaxation and storage.

Sympathetics also allow urine retention by causing the internal urethral sphincter in males to contract

34

Prior to voluntary control of the bladder around 3 years, what reflexively empties the bladder

The pontine micturition center