?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Event-related+alpha+oscillations+are+functionally+associated+with+P300+during+information+processing&rft.creator=Yordanova%2C+Juliana&rft.creator=Kolev%2C+Vasil&rft.subject=Behavioral+Neuroscience&rft.subject=Biophysics&rft.subject=Neurophysiology&rft.description=Recent+findings+indicate+that+the+electroencephalographic+alpha+(7-14+Hz)+activity+is+functionally+involved+in+cognitive+brain+functioning%2C+but+the+issue+of+whether+and+how+event-related+alpha+oscillations+may+relate+to+the+processes+indexed+by+the+P300+component+of+the+event-related+brain+potentials+(ERPs)+has+not+been+addressed.+The+present+study+assessed+the+effect+of+auditory+oddball+task+processing+on+slow+(7-10+Hz)+and+fast+(10-14+Hz)+alpha+activity+from+the+P300+latency+range.+ERPs+from+mentally+counted+targets+(20%25)+and+not+counted+nontargets+(80+%25)+were+recorded+at+Fz%2C+Cz%2C+and+Pz+in+nine+subjects.+Single-sweep+phase-locking%2C+power+of+phase-locked%2C+and+power+of+non-phase-locked+alpha+responses+during+P300+activity+were+quantified.+The+results+demonstrated+that+larger+and+more+synchronized+phase-locked+fast+alpha+components+at+anterior+(frontal-central)+locations%2C+with+reduced+non-phase-locked+slow+alpha+responses+at+the+parietal+site+were+produced+by+targets+relative+to+nontargets.+Because+the+simultaneously+recorded+P300+and+alpha+activity+manifested+a+similar+sensitivity+to+the+oddball+task%2C+event-related+alpha+appears+to+be+functionally+associated+with+the+cognitive+processing+demands+eliciting+P300.+Also%2C+evidence+is+provided+for+the+functional+involvement+of+frontally+synchronized+and+enhanced+alpha+oscillations+in+task+processing.+NeuroReport+9%3A+3159-3164+%C2%A9+1998+Lippincott+Williams+%26+Wilkins&rft.date=1998-10&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=text%2Fhtml&rft.identifier=http%3A%2F%2Fcogprints.org%2F64%2F1%2FAlpha_er.htm&rft.identifier=++Yordanova%2C+Juliana+and+Kolev%2C+Vasil++(1998)+Event-related+alpha+oscillations+are+functionally+associated+with+P300+during+information+processing.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F64%2F