?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Validity+ty+of+spectral+analysis+of+evoked+potentials+in+brain+research&rft.creator=Kramarenko%2C+Alexander&rft.creator=TAN%2C+UNER&rft.subject=Behavioral+Neuroscience&rft.subject=Computational+Neuroscience&rft.subject=Neurophysiology&rft.description=The+averaged+electronencephologram+(EEG)+response+of+the+brain+to+an+external+stimulus+(evoked+potential%2C+EP)+is+usually+subjected+to+spectral+analysis+using+the+fast+Fourier+transform+(FFT)%2C+especially+to+discover+the+relation+of+cognitive+ability+to+so-called+brain+++++++++dynamics.+There+is+indeed+a+discrepancy+between+these+two+systems%2C+because+the+brain+is+a+highly+complex+nonlinear+system%2C+analyzed+by+a+linear+system+(FFT).+We+present+in+this+work+some+inaccuracies+that+occurred+when+EPs+are+subjected+to+spectral+analysis%2C+using+a+model+signal.+First+of+all%2C+the+EP+power+spectra+depended+upon+the+++++++++number+of+samples+used+for+averaging%3B+the+input+EP+(model+signal)+and+the+output+EP+(from+the+system)+seemed+to+be+similar+in+forms%2C+but+they+exhibited+completely+different+spectral+power+curves.+It+was+concluded+that+the+spectral+analysis+of+evoked+responses+by+using+FFT+(linear+system+analysis)+in+relation+to+brain+(highly+complex+nonlinear+system)+may+mislead+neuroscientists.++%0A&rft.publisher=Taylor+%26+Francis&rft.contributor=Weinstein%2C+Sidney&rft.date=2002-04&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F2197%2F3%2FALEXTAN.pdf&rft.identifier=++Kramarenko%2C+Alexander+and+TAN%2C+UNER++(2002)+Validity+ty+of+spectral+analysis+of+evoked+potentials+in+brain+research.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F2197%2F