Fig. 6
From: Cerebral arterial flow dynamics during systole and diastole phases in young and older healthy adults
Representative arterial flow waveforms in young and elderly healthy population at extracranial and intracranial level. The total arterial flow curves are aligned relative to H0. The figure shows in light grey the total extracranial (green box) and intracranial (blue box) arterial flow curves of the twenty-eight healthy young volunteers (A) and the twenty healthy elderly volunteers (B). We obtained the representative arterial flow waveforms in HYV (in red, A) and HEV (in black, B) by fitting the eleven average points identified in the entire population. The representative waveforms were multiplied by the total mean flow value of the corresponding population to compare the arterial profiles in HYV and HEV (C). Note that the amplitude scale in C is different from A&B. The arterial waveforms in C are not normalized