What can be used to measure neural activity in brain?
Electrodes
1 of 18
Why can't these be used in humans?
They are invasive
2 of 18
What did Hubel and Wiesel find in cats?
That neurons in visual cortex responded to lines of different direction and orientation
3 of 18
However what does the invasive procedure mean we can't find out?
About complex skills e.g. playing an instrument
4 of 18
If we could use electrodes in the brain, what would be the drawback?
We would only get a small sample of neurons
5 of 18
What does PET stand for?
Positron Emission Tomography
6 of 18
What is injected into brain?
Radioactive tracers
7 of 18
What stays in brain that can detect flow?
Radioactive water (butanol)
8 of 18
What does a circular scintillation detector do?
Detects radiation
9 of 18
What did Raichle et al activate in their PET studies?
Visual cortex
10 of 18
What is the strength of PET studies?
Gives absolute measurements
11 of 18
what are the weaknesses?
Cannot use same participant multiple times due to radioactivity, poor temporal and spatial resolution and stimuli have to be applied for a long amount of time - not useful for most psych. studies
12 of 18
What does EEG stand for?
Electroencephalogram
13 of 18
What does EEG involve?
Electrodes on scalp
14 of 18
What does it measure?
Voltage changes from synaptic activity
15 of 18
What can it reveal changes in for different stimuli?
Processing speed
16 of 18
What is the advantage?
Good temporal resolution
17 of 18
What are the disadvantages?
Difficult to interpret and poor spatial resolution because brain waves are chaotic and spread out
18 of 18
Other cards in this set
Card 2
Front
Why can't these be used in humans?
Back
They are invasive
Card 3
Front
What did Hubel and Wiesel find in cats?
Back
Card 4
Front
However what does the invasive procedure mean we can't find out?
Back
Card 5
Front
If we could use electrodes in the brain, what would be the drawback?
Comments
No comments have yet been made