Dern Sebastian, Vogt Tobias, Abeln Vera, Strüder Heiko K, Schneider Stefan
Department of Exercise Neuroscience, Institute of Movement and Neurosciences, German Sport University Cologne, Am Sportpark Müngersdorf 6, 50933, Cologne, Germany.
Eur J Appl Physiol. 2014 Oct;114(10):2061-71. doi: 10.1007/s00421-014-2927-5. Epub 2014 Jun 17.
The aim of this study was to determine psychophysiological responses and cognitive performance after a single bout of artificial gravity, in order to investigate its use as a potential holistic countermeasure for long-duration human space flight, considering mental health.
Sixteen male participants were exposed to two different hypergravity protocols in a randomized order, one providing a constant +2 Gz environment for 30 min, the other providing participants for five times with repeated 3-min intervals of +2 Gz and rest, respectively. EEG was recorded prior, during and after AG. In addition, self-reported mood and cognitive performance was assessed before and after AG exposure. EEG data were analyzed using standardized brain electromagnetic tomography (sLORETA).
Beta-1 EEG activity (12-18 Hz) was decreased in the left middle frontal gyrus after the continuous profile. Participants' motivation decreased after continuous artificial gravity, while perceived physical state was increased. The intermittent profile did not induce any changes in the observed parameters. Cognitive performance was not affected by either of both profiles.
The continuous profile induced neurophysiological changes, which are considered with negative affect and withdrawal related motivation, according to the model of frontal asymmetry. This notion was further confirmed by decreases in self-reported mood after continuous AG. Therefore, the continuous profile would not be appropriate for the human space flight program. Intermittent AG did not induce any psychophysiological changes and might therefore provide a more appropriate approach as a countermeasure for further investigations.
本研究的目的是确定单次人工重力作用后的心理生理反应和认知表现，以探讨其作为长期载人航天潜在整体对策的用途，同时考虑心理健康。
16名男性参与者按随机顺序接受两种不同的超重力方案，一种提供持续30分钟的+2 Gz环境，另一种为参与者提供5次重复的3分钟+2 Gz和休息间隔。在人工重力作用前、期间和之后记录脑电图。此外，在人工重力暴露前后评估自我报告的情绪和认知表现。使用标准化脑电磁断层扫描（sLORETA）分析脑电图数据。
连续模式后，左侧额中回的β-1脑电图活动（12-18赫兹）降低。连续人工重力作用后参与者的动机下降，而感知到的身体状态增加。间歇模式未引起观察参数的任何变化。两种模式均未影响认知表现。
根据额叶不对称模型，连续模式引起了神经生理变化，这些变化与消极情绪和退缩相关动机有关。连续人工重力作用后自我报告情绪的下降进一步证实了这一观点。因此，连续模式不适用于载人航天计划。间歇性人工重力未引起任何心理生理变化，因此可能为进一步研究提供更合适的对策方法。
