FIGURE 13.

A conceptual block diagram describing the closed-loop identification of the carotid sinus baroreflex using an exogenous pressure perturbation. H1 and H2 represent the linear transfer function of the neural and peripheral arcs, respectively. V and H_v represent the command for the exogenous pressure perturbation and the transfer function from the command signal to arterial pressure (AP), respectively. N_c, unknown central noise; N_p, unknown peripheral noise; SNA, sympathetic nerve activity.