Week 9: ANS Flashcards

1
Q

Cell bodies of afferent neurons below the head regions are located within

A

Bilateral dorsal root ganglia

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2
Q

Cell bodies of efferent neurons are located

A

Within nuclei, which make up the grey matter of the CNS

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3
Q

Another name for autonomic neurons

A

Visceral efferent neurons

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4
Q

Where are interneurons located

A

In the CNS

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5
Q

Interneurons travel along

A

Tracts, which comprise the majority of the CNS white matter

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6
Q

Ascending tracts extend

A

From the spinal cord to the brain

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7
Q

Descending tracts extend

A

From the brain to the spinal cord

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8
Q

Association neurons

A

Interneurons from one brain region to another

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9
Q

Unconscious integration occurs

A

at the spinal cord

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10
Q

Conscious integration occurs

A

at the brain

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11
Q

Ganglion

A

Collection of neuron cell bodies located within the PNS

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12
Q

Cell bodies of efferent neurons are always located

A

In the CNS and form aggregations with other efferent cell bodies within the CNS

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13
Q

Nucleus

A

Aggregations of neuron cell bodies within the CNS

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14
Q

Mixed nerve

A

Comprised of both sensory neuron fibers and motor neuron axons

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15
Q

Pre-synaptic/ganglionic neuron cell body is located

A

In the CNS (brain nucleus/spinal cord gray matter)

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16
Q

Post synaptic/ganglionic neuron cell body is located

A

Within an autonomic ganglion, outside of CNS

17
Q

How many cranial nerves do mammals have?

18
Q

What cranial nerves have autonomic neurons?

A
  1. Oculomotor (CN III)
  2. Facial (CN VII)
  3. Glossopharyngeal (CN IX)
  4. Vagus (CN X)
19
Q

Sympathetic division is also called

A

Thoracolumbar division

20
Q

Parasympathetic division is also called

A

Craniosacral division

21
Q

Sympathetic generally synapse

A

Within the sympathetic chain ganglia

22
Q

Parasympathetic generally synapse on

A

Ganglia in organs they innervate

23
Q

Pre-synaptic cell bodies of SNS neurons are located

A

In the thoracic and lumbar regions of the spinal cord

24
Q

Splanchnic nerves

A
  • Communicate with pre-vertebral ganglia

- Comprised of pre-synaptic SNS axons that don’t synapse within the paravertebral chain

25
Three splanchnic ganglia
- Celiac ganglion: Near celiac artery - Cranial mesenteric ganglion: Near cranial mesenteric artery - Caudal mesenteric artery: Near caudal mesenteric artery
26
Celiac and cranial mesenteric together are called
Celiacomesenteric ganglion plexus
27
Pre SNS neurons that extend cranially to supply structures within the head and thorax synapse onto what post-SNS cell bodies
- Cervicothoracic ganglion - Middle cervical ganglion - Cranial cervical ganglion
28
Vagus nerve carries
Pre-PSNS axons from brain to thorax and abdomen
29
Vagosympathetic trunk is composed of
- Pre-SNS axons that extend cranially and synapse in cranial cervical ganglion - Pre-PSNS axons extending caudally and that synapse on terminal ganglia
30
Do the branches of the ANS have origins from the cervical region of the spinal cord?
Nope
31
How many synapses can occur with SNS and PSNS before synapsing on target tissue?
One
32
Visible autonomic ganglia must contain... | because...
Post-synaptic neuron cell bodies | Pre-synaptic are always in the CNS