Neuroscience CH 4 Flashcards Preview

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Flashcards in Neuroscience CH 4 Deck (171)
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1

Examining autopsy tissue has the allowance but also the drawback of...

Allowing neuroscientists to see what our brains look like but has the obvious drawbacks of telling them about how the systems work alive

2

What do neuropsychologists do? What does this help us conquer?

test the behaviour of patients with damage to certain parts of their brain. This allows us to know which parts of the brain do what depending on what part of the brain is damaged and what the patient therefore lacks in.

3

What is the drawback of neuropschologist work?

Inferences are made about the brain without possible smaller abnormalities being recognized that may cause the problem

4

Electroencephalograms are used for

recording brain activity or brain waves from the surface of the scalp during certain states such as awake or asleep

5

What is lesioning

destroying specific brain areas to see how behaviour changes

6

What are neuroimaging techniques used for

show visual images in awake humans

7

MRI, fMRI, PET, CT scans are all

neuroimaging techniques

8

Clinical observation allows

discovering of a number of brain disorders

9

What is a brain lesion?

Experimentally destroys brain tissue to study animal behaviours after such destruction

10

What is PET?

Positron Emission Tomography Scan is a visual display of brain activity that detects a radioactive form of glucose while the brain performs a given task

11

What is MRI scan?

Magnetic resonance imaging uses magnetic fields and radio waves to produce computer generated images that distinguish among different types of brain tissue

12

What are neurone?

(nerve cell) main building block of the brain

13

What are the three types of neurons?

sensory, motor, interneuron

14

Which neurone gathers sensory info

sensory

15

which neurone communicates info to muscles

motor

16

which neurone carries info between neurone in the brain and the spinal cord?

interneuron

17

Which neuron is unipolar?

interneuron

18

which neurone is bipolar?

sensory

19

which neurone is multipolar

motor

20

What is a cell body?

it contains the nucleus which provides energy for the neuron

21

What are dendrites

receive messages from other neurons

22

what does the axon fo

carries info away from the cell body

23

what does the axon terminals do

transmits signals to the dendrites on the next neurone

24

What is the myelin sheath?

a substance that speeds up the firing of the neuron

25

What do the nodes of ranvier do?

they are the small gaps on the neurone that have no myelin covering

26

what is the order of the neurone from one dendrite to the next

dendrite - cell body - axon - myelin sheath - nodes - terminals - muscle

27

Glia?

cells that help support neurons and basically also make up the nervous system

28

What do astrocytes do? (3)

They create blood-brain barrier, influences communication between neurone and helps heal brain damage

29

what are oligodendroglia

provide myelin to speed up transmission of neurons

30

what are microglia?

clean up dead cells and prevent infections in the brain