2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/84648We study the middle cerebral artery blood flow velocity (MCAfv) in humans using transcranial Doppler ultrasonography (TCD). The time series of the axial flow velocity averaged over a cardiac beat interval is found to exhibit clear multifractal properties for healthy subjects. We observe a loss of multifractality for subjects with migraine.4 figures, 3 Postscript figuresBiological PhysicsMedical PhysicsQuantitative Biologytext