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Flashcards in Neurophysiology Deck (42):
0

More numerous: glial cells or neurons

Glial cells

1

Produce CSF

Ependymal cells

2

Macrophage of the brain

Microglia

3

Regulates ECF ion levels, gives mechanical support, forms BBB

Astrocyte

4

Creates myelin in the CNS

Oligodendrocytes

5

Creates myelin in the PNS

Schwann cells

6

Brain tumor from non-mature neurons

Neuroblastoma, retinoblastoma

7

Receiving portion for NT of the neuron

Dendrites, cell body

8

Where action potential in a neuron actually starts

Axon hillock

9

Function of myelin sheath

Insulator

10

Unmyelinated portion of the axon

Nodes of ranvier

11

Branches of the axon

Neural fibril

12

Terminal portion of a neural fibril that containsNT-containing vesicles

Axon terminal/boutons/end-feet

13

Space between 2 neurons

Synapse

14

What do you call the death of the axon distal to the site of injury after an axon is transected?

Anterograde/orthograde degeneration

15

What do you call the changes in the soma after an axon is transected?

Axonal reaction/chromatolysis

16

Axonal regeneration occurs better in the CNS or PND?

PNS

17

Make the membrane potential less negative

Depolarization

18

Make the MP more negative

Hyperpolarization

19

Positive charges flowing into the cell

Inward current

20

Positive charges flowing out of the cell

Outward current

21

MP in which AP is inevitable

Threshold

22

Portion of the AP where MP is positive

Overshoot

23

Portion of AP where MP< RMP

Undershoot (hyperpolarizing afterpotential)

24

Na channel blockers of neurons

Tetradotoxin, saxitoxin

25

K channel blockers of neurons

Tetraethylammonium

26

Synaptic inputs that depolarize the post-synaptic cell

Excitatory post-synaptic potential (EPSP)

27

Synaptic inputs that hyperpolarize the post-synaptic cell

Inhibitory post-synaptic potential (IPSP)

28

2 or more presynaptic inputs arrive at postsynaptic cell simultaneously

Spatial summation

29

2 or more presynaptic inputs arrive at postsynaptic cell in rapid succession

Temporal summation

30

Repeated stimulation causes response of postsynaptic cell to be greater than expected

Nerve facilitation

31

Increased release of NT & increased sensitivity to the NT

Long term potentiation

32

Repeated stimulation causes decreased response of postsynaptic cell

Synaptic fatigue

33

Produces mainly oxytocin

Paraventricular nuclei

34

Produces mainly vasopressin

Supraoptic nuclei

35

Satiety center

Ventromedial nuclei

36

Hunger center

Lateral nuclei

37

Sweating (heat release)

Anterior hypothalamus

38

Shivering (heat conservation)

Posterior hypothalamus

39

Reward center

Medial forebrain bundle

40

Punishment center

Central gray area around aqueduct of Sylvius

41

Social inhibition

Amygdala