Structural and Functional imaging techniques PDF

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Neuroscience 2...

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Structural imaging: CT scan: - Series of x rays placed together - Can distinguish brain tissues, diagnose brain injuries (stroke) - P: quick and inexpensive - C: low resolution, can’t show tumours, expose to x-ray MRI: - Series of magnetic field image - Can distinguish different tissues (grey, white matter) Functional imaging: PET scan: - Measure amount of glucose consumed in area - Calculate exact location for language, memory - C: expensive, radioactive, all areas of brain active at some time fMRI: - Measure amount of oxygen used - P: very detailed image of brain activation, non invasive, not expensive - C: short brain activation is hard to measure, not precise timing EEG: - Measure action potential creating electrical activity through scalp with electrodes - Diagnose epilepsy - C: can’t tell from background noise (activity) ERP: - Over many EEG trials, noise balances out, location can be inferred - P: for short brain responses - C: not at high res as fMRI...