Figure 4.

Groups divided by CI and aVD. Four groups were formed by whether responses showed CI and aVD or not. The top panels show logratios of HR (red), SV (blue), and TPR (green) as cumulative areas as in Figure 3. The bottom panels show overlaid logratio means. The purple dotted line shows CO as the sum of logratios of HR and SV. The dotted vertical line at 45 s after onset of massage divides the early and late periods of analysis. Results are interpreted in the main text. The green arrow in the pure CI panel shows where mean TPR first becomes positive as proof of a corrective effect, ∼30 s after onset of massage. The red arrow in the pure aVD panel shows when HR first became positive as proof of a corrective BP-increasing effect, ∼15 s after onset of massage. aVD, arterial vasodepression; CI, cardioinhibition.