What is the effect of acceleration on cerebral blood flow?
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Acceleration, particularly +Gz acceleration, has a significant impact on cerebral blood flow (CBF). Studies have shown that under +Gz acceleration without straining maneuvers, CBF velocity decreases by up to 48%, leading to a caudal fluid shift within intra- and extracranial tissues . This decrease in CBF velocity is associated with the onset of visual symptoms like peripheral vision loss, which can be a precursor to gravity-induced loss of consciousness (GLOC) in pilots experiencing rapid acceleration . Researchers have developed models like the Civil Aerospace Medical Institute G-Effects Model (CGEM) to predict physiological effects accurately, aiding in understanding the risk of G-induced loss of consciousness and related phenomena in aeronauts . Noninvasive methods like transcranial ultrasound Doppler techniques are being explored to measure cerebral circulation during sustained acceleration, providing valuable insights into the effects of acceleration on CBF .
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| Papers (5) | Insight |
|---|---|
Open access•Journal Article 5 Citations | Acceleration can lead to brain hypoxia and loss of consciousness in fighter pilots due to increased hydrostatic pressure. Different acceleration rates cause varying visual symptoms impacting cerebral blood flow. |
4 Citations | Acceleration can lead to a severe decrease or loss of cephalad blood flow, potentially causing gravity-induced loss of consciousness (GLOC) in pilots during aggressive maneuvers. |
| Acceleration impacts cerebral blood flow, as studied in the paper using a computer model. The model aids in predicting G-induced effects like loss of consciousness and physiological responses accurately. | |
| Acceleration affects cerebral blood flow, with the Civil Aerospace Medical Institute G-Effects Model accurately predicting physiological responses to Gz exposure, aiding in assessing G-LOC risk in aviation. | |
Open access•Journal Article 01 Oct 1997-Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology 5 Citations | Acceleration, specifically +Gz without straining maneuvers, significantly decreases cerebral blood flow velocity by 48%, possibly inducing a caudal fluid shift from intra- and extracranial tissues. |
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