Measure microcirculatory responses after localized ischemia obtained by local application of pressure (laser speckle). The purpose of this study is to perform measurements of the methodological points made.~The study will investigate :~The effect of the duration and intensity of the pressure~The reproducibility of measurements~The correlation with ischemic hyperemia post
Measure microcirculatory responses after localized ischemia obtained by local application of pressure (laser speckle).