Nervous System Overview Flashcards

1
Q

What does the grey matter of the brain and spinal cord consist of?

A

Cell bodies

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2
Q

What does the white matter of the brain and spinal cord consist of?

A

Axons that form tracts (pathways)

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3
Q

At what vertebra does the spinal cord end?

A

L1-L2

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4
Q

What is a mixed nerve that carry motor, sensory and autonomic signals between the spinal cord and the rest of the body.

A

Spinal nerve

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5
Q

What are the two divisions of the nervous system?

A

The central nervous system and the peripheral nervous system

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6
Q

What are the two divisions of the peripheral nervous system?

A

Autonomic nervous system and somatic nervous system

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7
Q

What does the autonomic nervous system communicate with?

A

Communicates with internal organs and glands

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8
Q

What does the somatic nervous system communicate with?

A

Sense organs and voluntary muscles

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9
Q

What are the two divisions of the autonomic nervous system?

A

Sympathetic and parasympathetic

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10
Q

Does the sympathetic division of the autonomic nervous system have an arousing or calming effect?

A

Arousing

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11
Q

Does the parasympathetic division of the autonomic nervous system have an arousing or calming effect?

A

Calming

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12
Q

What are the two divisions of the somatic nervous system?

A

Sensory (afferent) and motor (efferent)

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13
Q

What is primary structure is the somatic nervous system derived from?

A

Somites

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14
Q

What embryonic structure is the central nervous system derived from?

A

From the neural tube

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15
Q

What embryonic structure does the peripheral nervous system derive from?

A

Developed from neural crest and CNS outgrowths

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16
Q

What is the general function of somatic nerves?

A

Receive information from and responds to external world

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17
Q

Somatic nerves innervate structures that are derived from what embryonic structure?

A

Somites

18
Q

What is the general function of visceral nerves?

A

Innervate organ systems and its elements, also detects and responds to information within the body

19
Q

A group of neuronal cell bodies in the CNS are called what?

A

Nucleus

20
Q

A group of neuronal cell bodies in the PNS are called what?

A

Ganglion

21
Q

What are the glia of the CNS?

A

Astrocyte, oligodendroglia, and microglia

22
Q

What is the glia of the PNS?

A

Schwann cell

23
Q

What are the three meninges of the CNS?

A

Dura mater, arachnoid, and pia mater

24
Q

What are the three connective tissues of the PNS?

A

Epineurium, perineurinum, and endoneurium

25
Q

What is the space beneath the arachnoid layer and why is it important?

A

The subarachnoid space and this is where cerebrospinal fluid (CSF) lies.

26
Q

What are the four main parts of the neuron?

A

Dendrites, cell body, axon, and terminal boutons

27
Q

Where is the spinal nerve first formed?

A

At the connection between the dorsal root and anterior root.

28
Q

What is it called when a spinal nerve splits?

A

Ramus or rami

29
Q

How does the spinal nerve leave the vertebral column?

A

Via the intervertebral foramen

30
Q

What is decussation?

A

This refers to the X-shaped crossing of nerve bundles at junctional regions, pyramidal decussations (brain-spinal cord), decussation of superior cerebellar peduncles (pons-midbrain)

31
Q

What is a commissure?

A

A link between the two sides of the nervous system ex corpus callosum

32
Q

What do ipsilateral and contralateral mean?

A

Ipsilateral means same side and contralateral means opposite side

33
Q

What is the sympathetic chain of the autonomic nervous system also called?

A

Paravertebral sympathetic trunk

34
Q

Where are the preganglionic sympathetic parts of the ANS?

A

T1-L2

35
Q

Where are the parasympathetic postganglionic cell bodies found?

A

Either in the head or the walls of the cells that they innervate

36
Q

Where are the major somatic nervous plexus of the anterior cervical rami?

A

C1-C4

37
Q

Where are the major somatic nervous plexus of the anterior brachial rami?

A

C5-T1

38
Q

Where are the major somatic nervous plexus of the anterior lumbar rami?

A

L1-L4

39
Q

Where are the major somatic nervous plexus of the anterior sacral rami?

A

L4-S4

40
Q

Where are the major somatic nervous plexus of the anterior coccygeal rami?

A

S5-Co