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Cerebrovascular reactivity and cerebral autoregulation are improved in the supine posture compared to upright in healthy men and women

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  • Michelle E Favre
  • Valerie Lim
  • Michael J Falvo
  • Jorge M Serrador

Abstract

Cerebrovascular reactivity and cerebral autoregulation are two major mechanisms that regulate cerebral blood flow. Both mechanisms are typically assessed in either supine or seated postures, but the effects of body position and sex differences remain unclear. This study examined the effects of body posture (supine vs. seated vs. standing) on cerebrovascular reactivity during hyper and hypocapnia and on cerebral autoregulation during spontaneous and slow-paced breathing in healthy men and women using transcranial Doppler ultrasonography of the middle cerebral artery. Results indicated significantly improved cerebrovascular reactivity in the supine compared with seated and standing postures (supine = 3.45±0.67, seated = 2.72±0.53, standing = 2.91±0.62%/mmHg, P

Suggested Citation

  • Michelle E Favre & Valerie Lim & Michael J Falvo & Jorge M Serrador, 2020. "Cerebrovascular reactivity and cerebral autoregulation are improved in the supine posture compared to upright in healthy men and women," PLOS ONE, Public Library of Science, vol. 15(3), pages 1-20, March.
    • Handle: RePEc:plo:pone00:0229049
    DOI: 10.1371/journal.pone.0229049
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