PSYC 4600 Lecture : January 31st 2012.docx

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Relevant to cognitive neuroscience (cn) especially for identifying locus of human lesions for neuropsychology. Lesions are usually not reversiblethis is why only animals are tested using this type of research unless a human has an ailment affecting their brain already that requires surgery/lesion/invasive procedures. Measure physiological changes corresponding to changes in cognitive processing. Measures correlation, not causation neuroimaging is basically a correlation technique only. Activity could be: (1) optional [observed activity would occur regardless of test/stimulation because it s coming from activation in another region than the one being measured. So you re observing something you don"t mean to. ] (2) a by-product, instead of causal. Activity associated with cognitive function x in regions a & b. Damage to area including a, but excluding b: no deficit in x. Damage to area including a & b: severe deficit in x. B essential for x regardless of whether it s damaged or not.

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