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. 2019 Jan 23;13:17. doi: 10.3389/fnins.2019.00017

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Copyright © 2019 Silva, Dias, da Silva, Salgado and Fazan Jr.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Comparison between slow and fast BRS. The BRS calculated using the transfer function (A) indicates that the fast components of SAP oscillations (HF band) induce a BRS that is more than three times higher the sensitivity of the slow components of SAP (LF band). Very similar results were found with the sequence method when the original or high-pass (HP) filtered series were used to measure the fast BRS components and low-pass (LP) filtered series to measure the slow BRS (B,C). The minimum sequence length was set to n = 3 for both original and filtered series. SAP: systolic arterial pressure; LF: low-frequency; HF: high-frequency; d: delay between arterial pressure and PI; ^∗ P < 0.05 compared to LF (A) or LP (B,C). Values are mean ± standard error.