What does fMRI measure?
Blood flow in the brain
What does an fMRI create?
A 3D image. Highlighted areas involved in activity.
Positives of fMRI
Safe
Non invasive
Spatial resolution
What is the Spatial resolution of fMRI?
1-2mm
Negatives of fMRI
Poor temporal resolution
Not a direct measure of blood flow
What is the temporal resolution of fMRI?
1-4 seconds
What does an EEG measure?
Electrical activity.
Electrodes attached to the scalp.
Graphed over time.
What can EEG detect?
Sleep patterns.
REM
Epilepsy
Alzheimers
Positives of EEG
Safe
Non invasive
Temporal resolution
What is the temporal resolution of EEG?
Every millisecond
Negatives of the EEG?
Uncomfortable
Poor Spatial resolution
Difficult to pinpoint an area
May cause seizures
What do EEG graphs display?
Amplitude
Frequency
What does an ERP measure?
Brain activity related to a stimulus
Positives of an ERP
Safe
Non invasive
Temporal resolution
Negatives of the ERP
Poor Spatial resolution
Uncomfortable
Background noise may affect brain activity
Stimulus needs to be presented many times
ERPS within 100 milliseconds are?
Sensory
ERPS after 100 milliseconds are?
Cognitive
What is Port Mortem?
Study of the brain after death.
Examples of post mortem?
Brocas research
Wernickes research
Iverson = high concentration of dopamine in brains of schizophrenics
Positives of post mortem
Detailed examination
Negatives of post mortem
Unethical
Invasive
Extraneous variables
Causation
