抄録
We have focused the spontaneous rhythmic skin blood flow fluctuation (the vasomotion or the basic wave, main frequency around 0.1Hz) measured with the laser Doppler flowmetry as an index of autonomic nervous activity. The purposes of this basic study were to find suitable measuring points of the skin blood flow and to find the evaluation method of vasomotion by comparing the HRV parameters. We measured the skin blood flow on 3 points (forehead, left earlobe and nose point) and ECG simultaneously. As the experimental tasks, the posture differences (supine, sitting and standing) and mental task (1 digit adding task)) were used. 11 male subjects and 11 female subjects were participated to this experiment. From the results, 1) the suitable measuring points of the vasomotion are earlobe and forehead. 2) LF/HF ratio and HF of HRV showed significant change among posture difference, but the vasomotion parameter did not show the significant change. This result suggests that the experimental task influenced mainly the cardio vascular indices, and the vasomotion parameter in this experiment might not be suitable to evaluate these dynamic changes.
