Autonomic Nervous System Flashcards Preview

Anatomy - Thorax and Abdomen > Autonomic Nervous System > Flashcards

Flashcards in Autonomic Nervous System Deck (16)
Loading flashcards...
0

What is another name for the sympathetic nervous system?

Thoracolumbar

1

What is another name for the parasympathetic nervous system?

Craniosacral

2

What is the segmental length of the sympathetic nervous system?

T1-L2 or L3

3

What is the segmental length of the parasympathetic nervous system?

Arises from the cranial nerve nuclei and S2-S4

4

How many neurons are required for both ANS systems and what are they?

2 - presynaptic (preganglionic) neuron and postsynaptic (postganglionic) neuron

5

Where do sympathetic and parasympathetic neurons sit in relation to the CNS and target organ?

Sympathetic neuron (ganglion) sits closer to the spinal cord and the parasympathetic neuron (ganglion) sits closer to the target organ

6

What neurotransmitters are associated with sympathetic and parasympathetic postsynaptic neurons?

Sympathetic = norepinephrine
Parasympathetic = acetylcholine

7

Where are the presynaptic cells bodies located?

Intermediolateral cell columns in the lateral horns

8

What are the two locations of postsynaptic cells?

Paravertebral ganglia or prevertebral ganglia

9

What is the journey of a neuron?

Presynaptic neuron exits the ventral horn through the ventral root of the spinal nerve and exits via the white rami then travels to the sympathetic ganglion to synapse and become a postsynaptic neuron which then exits via the gray rami

10

What are the four routes of a presynaptic fiber?

Ascend, descend, synapse at level, or pass through

11

Which route of the presynaptic neuron goes to the abdominal viscera?

The fibers that pass through

12

Which fibers have a longer distance to travel?

Postsynaptic fibers

13

What is the function of a splanchnic nerve?

Allow the presynaptic fibers to pass through to the prevertebral ganglia (fibers that pass through to abdominal viscera)

14

What are the two locations of the presynaptic neuron of the PSNS?

Gray matter of brain stem of cranial nerves III, VII, IX, and X or the gray matter of S2-S4

15

What are the locations of the presynaptic neurons of the PSNS?

Cranial nerves III, VII, and IX - head
Sacral nerves - pelvic viscera
Cranial nerve X (vagus nerve) - thoracic, abdomen and GI tract