Journal of Computational Neuroscience

, Volume 18, Issue 1, pp 67–83 | Cite as

Spectral Analysis of Event-Related Hemodynamic Responses in Functional Near Infrared Spectroscopy

  • Ceyhun Burak Akgül
  • Bülent Sankur
  • Ata AkinEmail author


The goal of this paper is to design experiments that confirm the evidence of cognitive responses in functional near infrared spectroscopy and to establish relevant spectral subbands. Hemodynamic responses of brain during single-event trials in an odd-ball experiment are measured by functional near infrared spectroscopy method. The frequency axis is partitioned into subbands by clustering the time-frequency power spectrum profiles of the brain responses. The predominant subbands are observed to confine the 0–30 mHz, 30–60 mHz, and 60–330 mHz ranges. We identify the group of subbands that shows strong evidence of protocol-induced periodicity as well as the bands where good correlation with an assumed hemodynamic response models is found.

near infrared spectroscopy cerebrovascular dynamics time-frequency distribution oscillary brain dynamics 


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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  1. 1.Electrical and Electronics Engineering DepartmentBoğaziçi UniversityBebekTurkey
  2. 2.Institute of Biomedical EngineeringBoğaziçi UniversityBebekTurkey

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