measuring brain activity blood flow fmri, pet, nirs electrical activity eeg
TRANSCRIPT
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Measuring brain activity
Blood flow
fMRI, PET, NIRS
Electrical activity
EEG
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Measuring brain activity
Blood flow
fMRI, PET, NIRS
Electrical activity
EEG, MEG, Intracranial,Single cell,Intracellular
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Measuring brain activity
Blood flow
fMRI, PET, NIRS
Electrical activity
= Can be direct, when you insert the electrode in the brain, or even in the neuron
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Awake
REM
Stage 1
Stage 3
Stage 2
Stage 4
alpha beta
theta beta
theta
delta
delta
alpha beta
theta beta
theta
delta
delta
Slow waves,hence ‘slow-wavesleep’
Brain waves and sleep states
K
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Effects of attention
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Gambling and the frustrated brain
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ERP: event-related potentialChannel FCz: electrode over Frontal Cortex, central
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• Single-unit studies, recording electrical discharges of individual neurons
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The work of Wolfram Schultz et al. Dopamine neurons & reward
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Not a response to reward itself, but to information about reward
• More than predicted (“unexpected”)= increased activity
• Exactly as predicted (“expected”)= no change in activity
• Less than predicted (“unexpected”)= reduced activity