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  • Research Article
  • Open Access

Time-Frequency Characterization of Cerebral Hemodynamics of Migraine Sufferers as Assessed by NIRS Signals

  • 1Email author,
  • 1,
  • 2,
  • 2,
  • 2,
  • 3 and
  • 3
EURASIP Journal on Advances in Signal Processing20102010:459213

  • Received: 31 December 2009
  • Accepted: 24 June 2010
  • Published:


Near-infrared spectroscopy (NIRS) is a noninvasive system for the real-time monitoring of the concentration of oxygenated ( ) and reduced (HHb) hemoglobin in the brain cortex. and HHb concentrations vary in response to cerebral autoregulation. Sixty-eight women (14 migraineurs without aura, 49 migraineurs with aura, and 5 controls) performed breath-holding and hyperventilation during NIRS recordings. Signals were processed using the Choi-Williams time-frequency transform in order to measure the power variation of the very-low frequencies (VLF: 20–40 mHz) and of the low frequencies (LF: 40–140 mHz). Results showed that migraineurs without aura present different LF and VLF power levels than controls and migraineurs with aura. The accurate power measurement of the time-frequency analysis allowed for the discrimination of the subjects' hemodynamic patterns. The time-frequency analysis of NIRS signals can be used in clinical practice to assess cerebral hemodynamics.


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Authors’ Affiliations

Biolab, Department of Electronics, Polytechnic of Turin, 10129 Torino, Italy
Department of Neuroscience, Gradenigo Hospital, 10153 Turin, Italy
Women's Headache Center, Department of Gynecology and Obstetrics, University of Torino, 10126 Torino, Italy


© Filippo Molinari et al. 2010

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.