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Flashcards in Nervous System Overview Deck (40)
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1

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

Cell bodies

2

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

Axons that form tracts (pathways)

3

At what vertebra does the spinal cord end?

L1-L2

4

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

Spinal nerve

5

What are the two divisions of the nervous system?

The central nervous system and the peripheral nervous system

6

What are the two divisions of the peripheral nervous system?

Autonomic nervous system and somatic nervous system

7

What does the autonomic nervous system communicate with?

Communicates with internal organs and glands

8

What does the somatic nervous system communicate with?

Sense organs and voluntary muscles

9

What are the two divisions of the autonomic nervous system?

Sympathetic and parasympathetic

10

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

Arousing

11

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

Calming

12

What are the two divisions of the somatic nervous system?

Sensory (afferent) and motor (efferent)

13

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

Somites

14

What embryonic structure is the central nervous system derived from?

From the neural tube

15

What embryonic structure does the peripheral nervous system derive from?

Developed from neural crest and CNS outgrowths

16

What is the general function of somatic nerves?

Receive information from and responds to external world

17

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

Somites

18

What is the general function of visceral nerves?

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

19

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

Nucleus

20

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

Ganglion

21

What are the glia of the CNS?

Astrocyte, oligodendroglia, and microglia

22

What is the glia of the PNS?

Schwann cell

23

What are the three meninges of the CNS?

Dura mater, arachnoid, and pia mater

24

What are the three connective tissues of the PNS?

Epineurium, perineurinum, and endoneurium

25

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

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

26

What are the four main parts of the neuron?

Dendrites, cell body, axon, and terminal boutons

27

Where is the spinal nerve first formed?

At the connection between the dorsal root and anterior root.

28

What is it called when a spinal nerve splits?

Ramus or rami

29

How does the spinal nerve leave the vertebral column?

Via the intervertebral foramen

30

What is decussation?

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)