Psychology 2800E Lecture 3: PSYCH 2135A: Cogntive Psych Lecutre 3
22 Oct 2017
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Non functional not tied to brain function but instead brain structure. Can detect structural anomalies tumors, brain bleeds, etc. Measure cerebral blood flow, those areas functioning will need more function (measured by a radiation isotope) That"s why you are measuring radiation decay (less radioactive isotope, less function) Con of this is it"s more invasive, they need to ingest isotope. All brain is active all the time, but doing some tasks or thinking of certain things (imagining playing tennis) Subtractive technique determine relative activity for a task vs no task fmri. F measure function in the body. Blood flow increases as a function of neural activity . The fmri signal depends on the difference in the magnetic properties of oxygenated and deoxygenated hemoglobin. You can measure this really quickly with the fmri and a pro is that you don"t have to ingest anything. (look up other benefits)
