Table 2.

Transfer functions of baroreflex peripheral arc (from SNA to AP) in open-loop and closed-loop-spontaneous conditions

	Open-loop TF (Hp-open, SNA to AP)	Closed-loop-spontaneous TF (Hp-closed-spon, SNA to AP)
Gain (mmHg a.u.−1)
0.01 Hz	0.7 ± 0.2	0.6 ± 0.2
0.1 Hz	0.1 ± 0.1	0.1 ± 0.1
0.3 Hz	0.03 ± 0.01	0.03 ± 0.02
Phase (rad)
0.01 Hz	−0.8 ± 0.2	−0.9 ± 0.2
0.1 Hz	−3.0 ± 0.2	−3.0 ± 0.2
0.3 Hz	−4.2 ± 0.1	−4.0 ± 0.3
Coherence
0.01 Hz	0.9 ± 0.1	0.8 ± 0.2
0.1 Hz	0.8 ± 0.2	0.6 ± 0.2*
0.3 Hz	0.9 ± 0.1	0.4 ± 0.3*
Step response
Steady-state level (mmHg)	−0.7 ± 0.2	−0.6 ± 0.2

Values are mean ± SD (n = 10).

^*P < 0.05; open-loop vs. closed-loop-spontaneous conditions. TF, transfer function.