Autonomic Nervous System Flashcards Preview

Hugh's MD1 Neuro > Autonomic Nervous System > Flashcards

Flashcards in Autonomic Nervous System Deck (24):
1

What is the post ganglionic neurotransmitter and receptor in the sympathetic NS?

NA and adrenoceptors 

and a few ACh with muscarinic

1

What are some common non-classical neurotransmitters?

ATP
NO

Neuropeptides

1

What is the difference between a supraspinal and spinal reflex?

Supraspinal reflexes integrate input from the brain

Spinal reflexes don't

1

What is the most important structure in the central coordination of autonomic output and what information does it receive?

Hypothalamus

 

Sensory pathways

Intrinsic sensory structures eg osmoreceptors

Hormonal input

2

Do prevertebral ganglia coordinate divergently or covergently?

Convergently

3

What is the post ganglionic neurotransmitter and receptor in the parasympathetic NS?

ACh and muscarinic 

4

What are the brainstem nuclei of the parasympathetic NS?

Edinger Westphal

Salivatory nuclei

Dorsal motor nucleus of vagus and nucleus ambiguous

4

What is unique about the pelvic ganglia?

They are mix of para and sympathetic NS

Generally just a relay station

Parasympathetic have unusually long axons: vunerable

5

What are some examples of sympathetic NS responses?

Increase HR and contractility

Increase blood to skeletal muscles

Decrease blood to gut

Decrease gut motility

Relax airways

8

Which nerves of the autonomic nervous system originate from the cervical and lumbar enlargements?

Neither

10

Where do nerves of the parasympathetic NS originate in the spinal cord?

Brainstem and sacrum

12

Where are ganglia of the parasympathetic NS system generally found?

On organs

12

Where are the ganglia and what structures do they supply for paravertebral ganglion?

In a chain parallel to the spinal cord 

Supplies the vessels

13

What are some examples of parasympathetic action?

Decrease HR and contractily

Constrict airways

Increase gut motility

 

14

Neurotransmission at organs sometimes differs to skeletal muscle, how so?

More than one transmission point per axon

 

16

Where are the ganglia and what structures do they supply for prevertebral ganglion?

Anterior to the spinal cord

Non-vascular smooth muscle

17

Do paravertebral ganglia coordinate divergently or covergently?

Divergently

18

What makes the sympathetic NS response potentially greater than the parasympathetic?

Activation of the adrenal glands and release of circulating hormones (adrenaline and noradrenaline)

19

Where do nerves for the sympathetic nervous system originate in the spinal cord?

Thoracolumbar region

20

What is the preganglionic neurotransmitter and receptor in the autonomic NS?

ACh and nicotinic

21

What does the caudal part of the nucleus of the solitary tract do in processing of information for reflexes?

Either sends output back to the local reflex centre in the SC

or

Sends information up to the higher centre to drive more complex responses

22

Where are the pre-ganglionic nuclei of the sympathetic NS in the spinal cord?

Intermediolateral cell column

23

What structure allows the supraspinal aspect of the autonomic system?

Caudal part of the nucleus of the solitary tract

24

What the two patterns of ganglia structure in the sympathetic NS?

Paravertebral - parallel to the spinal cord

Prevertebral - on the midline