scholarly journals Cerebral blood flow regulation during blood loss compared to lower body negative pressure in humans (1068.9)

2014 ◽  
Vol 28 (S1) ◽  
Author(s):  
Jill Barnes ◽  
Blair Johnson ◽  
Victor Convertino ◽  
Michael Joyner ◽  
Caroline Rickards
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Blood Loss ◽  
Negative Pressure ◽  
Lower Body Negative Pressure ◽  
Flow Regulation ◽  
Lower Body ◽  
Blood Flow Regulation

scholarly journals Effect of acute hypoxemia on cerebral blood flow velocity control during lower body negative pressure

2018 ◽  
Vol 6 (4) ◽  
pp. e13594 ◽  
Author(s):  
Noud van Helmond ◽  
Blair D. Johnson ◽  
Walter W. Holbein ◽  
Humphrey G. Petersen-Jones ◽  
Ronée E. Harvey ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Flow Velocity ◽  
Negative Pressure ◽  
Blood Flow Velocity ◽  
Cerebral Blood Flow Velocity ◽  
Lower Body Negative Pressure ◽  
Lower Body ◽  
Velocity Control

scholarly journals Difference Between Fit Vs. Unfit In Cerebral Blood Flow Response To Lower Body Negative Pressure

2021 ◽  
Vol 53 (8S) ◽  
pp. 93-93
Author(s):  
Ai Hirasawa ◽  
Kazukuni Hirabuki ◽  
Noritaka Hata ◽  
Tomoya Suda ◽  
Yuki Sano ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Negative Pressure ◽  
Lower Body Negative Pressure ◽  
Lower Body ◽  
Blood Flow Response ◽  
Flow Response

Cerebral Blood Flow Velocity During Combined Lower Body Negative Pressure and Cognitive Stress

2015 ◽  
Vol 86 (8) ◽  
pp. 688-692 ◽  
Author(s):  
John J. Durocher ◽  
Jason R. Carter ◽  
William H. Cooke ◽  
Angelea H. Young ◽  
Morton H. Harwood
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Flow Velocity ◽  
Negative Pressure ◽  
Blood Flow Velocity ◽  
Cerebral Blood Flow Velocity ◽  
Lower Body Negative Pressure ◽  
Lower Body ◽  
Cognitive Stress

scholarly journals Nightly Sustained Lower Body Negative Pressure Attenuates Reductions in Cerebral Blood Flow Associated with Simulated Microgravity

2021 ◽  
Vol 35 (S1) ◽  
Author(s):  
Christopher Hearon ◽  
Katrin Dias ◽  
James Macnamara ◽  
John Marshall ◽  
James Leidner ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Negative Pressure ◽  
Simulated Microgravity ◽  
Lower Body Negative Pressure ◽  
Lower Body

scholarly journals The influence of combined lower body negative pressure and mental stress on cerebral blood flow in men and women

2013 ◽  
Vol 27 (S1) ◽  
Author(s):  
Angelea H. Young ◽  
Chelsea R. Strong ◽  
William H. Cooke ◽  
Jason R. Carter ◽  
John J. Durocher
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Negative Pressure ◽  
Mental Stress ◽  
Lower Body Negative Pressure ◽  
Lower Body ◽  
Men And Women

scholarly journals The cerebrovascular response to lower-body negative pressure vs. head-up tilt

2017 ◽  
Vol 122 (4) ◽  
pp. 877-883 ◽  
Author(s):  
Anne-Sophie G. T. Bronzwaer ◽  
Jasper Verbree ◽  
Wim J. Stok ◽  
Mat J. A. P. Daemen ◽  
Mark A. van Buchem ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Negative Pressure ◽  
Cerebral Blood Flow Velocity ◽  
Lower Body Negative Pressure ◽  
Orthostatic Stress ◽  
Lower Body ◽  
Head Up Tilt ◽  
End Tidal ◽  
Pronounced Reduction

Lower-body negative pressure (LBNP) has been proposed as a MRI-compatible surrogate for orthostatic stress. Although the effects of LBNP on cerebral hemodynamic behavior have been considered to reflect those of orthostatic stress, a direct comparison with actual orthostasis is lacking. We assessed the effects of LBNP (−50 mmHg) vs. head-up tilt (HUT; at 70°) in 10 healthy subjects (5 female) on transcranial Doppler-determined cerebral blood flow velocity (CBF v) in the middle cerebral artery and cerebral perfusion pressure (CPP) as estimated from the blood pressure signal (finger plethysmography). CPP was maintained during LBNP but decreased after 2 min in response to HUT, leading to an ~15% difference in CPP between LBNP and HUT ( P ≤ 0.020). Mean CBF v initially decreased similarly in response to LBNP and for HUT, but, from minute 3 on, the decline became ~50% smaller ( P ≤ 0.029) during LBNP. The reduction in end-tidal Pco2 partial pressure (PetCO2) was comparable but with an earlier return toward baseline values in response to LBNP but not during HUT ( P = 0.008). We consider the larger decrease in CBF v during HUT vs. LBNP attributable to the pronounced reduction in PetCO2 and to gravitational influences on CPP, and this should be taken into account when applying LBNP as an MRI-compatible orthostatic stress modality. NEW & NOTEWORTHY Lower-body negative pressure (LBNP) has the potential to serve as a MRI-compatible surrogate of orthostatic stress but a comparison with actual orthostasis was lacking. This study showed that the pronounced reduction in end-tidal Pco2 together with gravitational effects on the brain circulation lead to a larger decline in cerebral blood flow velocity in response to head-up tilt than during lower-body negative pressure. This should be taken into account when employing lower-body negative pressure as MRI-compatible alternative to orthostatic stress.

scholarly journals CHANGES IN CEREBRAL BLOOD FLOW AND BRAIN TEMPERATURE INDUCED BY LOWER BODY NEGATIVE PRESSURE

1969 ◽  
Vol 19 (2) ◽  
pp. 260-271 ◽  
Author(s):  
Tetsuo NAGASAKA ◽  
Shigeo MORI ◽  
Sadaharu TAKAGI ◽  
Genyo MITARAI
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Negative Pressure ◽  
Lower Body Negative Pressure ◽  
Brain Temperature ◽  
Lower Body
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