Cerebral hemodynamic reactivity measured by near-infrared spectroscopy in migraineurs.
Brain hemodynamic responses (BHR) of healthy subjects and migraineurs performing a breath holding task are measured by functional near-infrared spectroscopy (fNIRS) method. The response curves are deconvolved from a rectangular input function to yield the impulse response (IR) function of BHR which was then modeled by a summation of three gaussians. Our results show that the amplitude coef&#163;cients estimated from IR of BHRs are approximately 350% and the dispersion coef&#163;cients 145% higher for healthy subjects. These results con&#163;rm the &#163;ndings of several other researchers where a decrease in cerebral blood &#164;ow has been shown for migraineurs during breath holding tasks.
Akin
Ata
A
Institute of Biomedical Engineering, Bogazici University, Bebek, Istanbul, 34342 Istanbul ata.akin@boun.edu.tr.
Emir
Uzay
U
Bolay
Hayrunnisa
H