?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=The+Phase-Locking+of+Auditory+Gamma+Band+Responses+in+Humans+is+Sensitive+to+Task+Processing&rft.creator=Yordanova%2C+Juliana&rft.creator=Kolev%2C+Vasil&rft.creator=Tamer%2C+Demiralp&rft.subject=Behavioral+Neuroscience&rft.subject=Behavioral+Biology&rft.subject=Neurophysiology&rft.subject=Physiological+Psychology&rft.description=The+present+study+assessed+the+effects+of+stimulus+task-relevance+and+certainty+on+early+and+late+40+Hz+(gamma+band)+responses+(GBRs)+in+humans.+Auditory+GBRs+of+nine+young+adults+were+recorded+in+passive+listening%2C+simple+reaction+task%2C+and+choice-reaction+task+(target+probability+%3D+0.5)+conditions+and+evaluated+in+three+consecutive+post-stimulus+periods+(0-120%2C+120-250%2C+250-400+ms)+corresponding+to+the+serial+occurrence+of+gamma+oscillation+bursts.+Amplitude+and+phase-locking+of+GBRs+within+these+bursts+were+analyzed+separately+at+the+level+of+single+sweeps+by+applying+a+method+that+allows+the+independent+quantification+of+between-sweep+synchronization.+Major+results+showed+that+the+effects+of+stimulus+certainty+and+task-relevance+on+single-response+amplitude+were+specific+and+different+from+the+effects+on+the+phase-locking.+Also%2C+the+functional+involvement+of+the+early+and+late+auditory+gamma+responses+was+distinct%3A+early+auditory+gamma+band+responses+appear+primarily+associated+with+focused+attention%2C+while+the+late+gamma+responses+vary+with+motor-task+relevance.+It+is+concluded+that+along+with+power+measures%2C+the+stability+of+phase-locking+of+gamma+band+responses+should+be+regarded+as+a+functionally+meaningful+parameter+that+varies+with+processing+demands+and+recording+site.&rft.date=1997-12&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=text%2Fhtml&rft.identifier=http%3A%2F%2Fcogprints.org%2F49%2F1%2Fgamma.htm&rft.identifier=++Yordanova%2C+Juliana+and+Kolev%2C+Vasil+and+Tamer%2C+Demiralp++(1997)+The+Phase-Locking+of+Auditory+Gamma+Band+Responses+in+Humans+is+Sensitive+to+Task+Processing.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F49%2F