Does gradual change in head positioning affect cerebrovascular physiology?

Physiol Rep · 2018 · PMC5803526 · PMID 29417750

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a nonsignificant trendno p-value reported

During the DOWN phase (450 to 480 sec), there was a nonsignificant trend toward recovery, compared to the UP position (Fig. 3 , DH 48.75 ± 12.64 to 50.11 ± 13.67 cm·sec −1 ; NDH 49.31 ± 12.91 to 52.36 ± 14.61 cm·sec −1 ).

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highly significantno p-value reported

Of relevance, with the exception of HR and ETCO 2 , most other parameters (BP, CBV, CrCP, RAP) showed highly significant transient (dynamic) changes in response to head elevation or return to the 0° flat position.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.