PSYCO367 Chapter Notes - Chapter 4: Magnetic Resonance Imaging, Radioactive Tracer, Visual Cortex
2 Feb 2018
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Document Summary
Spatial organization- how different locations in the environment and on the receptors are represented in the brain. The neural map on the striate cortex (area v1) Brain imaging- procedures that make it possible to visualize areas of the human brain that are activated by different types of stimuli, tasks, or behaviours. Magnetic resonance imaging (mri: 1980s: made it possible to create images of structure within the brain, has become a standard technique for detecting tumours and other brain abnormalities. Positron emission topography (pet: person is injected with a harmless radioactive tracer, tracer moves through bloodstream, monitoring the radioactivity measures blood flow, changes in blood flow show changes in brain activity. Increases or decreases in brain activity associated with cognitive activity are indicated by colours, with specific colours indicating the amount of activation. Subtraction method: used in pet and fmri, brain activity is determined by, measuring activity in a control state, measuring activity in a stimulation state.
