Nili, MishaAbidi, SyedSerna, StephaniaKim, SimonEdgell, Heather2021-04-082021-04-082017-08-01Nili M, Abidi S, Serna S, Kim S, Edgell H. Influence of sex, menstrual cycle, and oral contraceptives on the cerebrovascular response to paced deep breathing. Clin Auton Res. 2017 Dec;27(6):411-415. doi: 10.1007/s10286-017-0455-1. Epub 2017 Aug 1. PMID: 28766085.10.1007/s10286-017-0455-1http://hdl.handle.net/10315/38281Purpose Deep breathing assesses autonomic function; however, many researchers/clinicians do not account for hyperventilation, brain blood flow or blood pressure. Methods Men and women (with/without oral contraceptives) participated. women participated during low and high hormone phases of the menstrual cycle. Blood pressure, end-tidal carbon dioxide, middle cerebral artery velocity and cerebrovascular resistance were assessed. Results Deep breathing decreased end-tidal carbon dioxide and middle cerebral artery velocity while increasing cerebrovascular resistance in all participants; blood pressure decreased in men. There were no influences of menstrual cycle or oral contraceptives. Conclusions Men have different autonomic responses to deep breathing compared to women.enCapnographyBlood PressureHeart rateCerebrovascular CirculationArticlehttps://www.springer.com/journal/10286https://link.springer.com/article/10.1007/s10286-017-0455-1