Multiple gamma oscillations in the brain: A new strategy to differentiate functional correlates and P300 dynamics


Basar E., Tulay E., GÜNTEKİN B.

INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY, vol.95, no.3, pp.406-420, 2015 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 95 Issue: 3
  • Publication Date: 2015
  • Doi Number: 10.1016/j.ijpsycho.2015.01.013
  • Journal Name: INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Social Sciences Citation Index (SSCI), Scopus
  • Page Numbers: pp.406-420
  • Istanbul Kültür University Affiliated: Yes

Abstract

Brain oscillations in the gamma frequency band, - i.e. oscillations greater than 25 Hz - have attracted increasing attention over the last few decades in the research of sensory-cognitive processes. In the neuroscience research literature, a great number of reports aim to describe the functional correlates of oscillatory responses in the gamma frequency window. However, analysis using a broadband frequency window often leads to divergent functional interpretations and controversies. In order to provide a more exact approach, we have used a strategy by defining multiple frequency and multiple time windows according to the combined analysis of conventional power spectral windows, frequency adaptive multiple filters, and inter-trial coherence. The analysis in frequency windows of 25-30 Hz, 30-35 Hz, and 4048 Hz enables the investigator to provide a distinction of cognitive and/or sensory responses. Moreover, according to topological differentiation and the consideration of neuroanatomic pathways, more reliable interpretations of gamma responses are reached. (C) 2015 The Authors. Published by Elsevier B.V.