High G forces affect cognitive functions. Withstanding to the negative effects of G forces is positively correlated with pilots’ readiness and countermeasures that were taken against. Therefore, factors that decrease resistance to G-forces will increase G induced cognitive impairment. Changes in blood pressure affect the cerebral perfusion and disrupt high cortical functions. We investigated the negative effects of acceleration forces on cognitive functions via Time Wall Psychometric Tests which were applied to pilots before and after Human Centrifuge Training. Positive correlation of pilot’s height with PsAc (Post Training Accuracy) (P˂0.05), PsMAP (Post-Training Mean Arterial Pressure) with pilot’s ages (P˂0.05) and flight times (P˂0.01) were showed in our study. PsMAP values were lower than Pre-Training Mean Arterial Pressure values in younger aged (P˂0.001) and lower flight hour pilots (P˂0.01). PsAc values were higher than PrAc (Pre-Training) values within the younger aged pilots’ group (P˂0.05). Between age’s groups analyzes showed that, PsAc values of older aged group were found to be lower than younger aged group (P˂0.05). PsAc values were more affected in lower flight hour and taller pilots’ group (P > 0.05). In our study, cognitive functions are less affected in older aged and more experienced pilots. Height was considered to influence G tolerance but provided small contributions. We concluded that cardiovascular changes are held responsible for the cognitive dysfunctions caused by +Gz exposure. Increased pilot’s ability to recognize of acceleration forces and knowing how to cope with it, results in increased adaptation to G forces over the years.

中文翻译：

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加速力对认知功能的影响

高G力会影响认知功能。承受G力的负面影响与飞行员的战备状态和所采取的对策正相关。因此，降低抵抗力的因素会增加G引起的认知障碍。血压的变化会影响大脑的灌注并破坏高皮质功能。我们通过时间墙心理测验研究了加速度对认知功能的负面影响，该测验适用于人体离心训练前后的飞行员。飞行员身高与PsAc（训练后准确性）（P˂0.05），PsMAP（训练后平均动脉压）与飞行员的年龄（P˂0.05）和飞行时间（P˂0.01）正相关）显示在我们的研究中。PsMAP值低于年轻人（P˂0.001）和较低飞行小时飞行员（P˂0.01）的训练前平均动脉压值。在较年轻的飞行员组中，PsAc值高于PrAc（训练前）值（P˂0.05）。各年龄组之间的分析表明，老年组的PsAc值低于年轻组（P˂0.05）。在较低的飞行小时和较高的飞行员组中，PsAc值受到的影响更大（P > 0.05）。在我们的研究中，认知功能受老年人和经验丰富的飞行员的影响较小。高度被认为会影响G耐受性，但贡献很小。我们得出的结论是，心血管变化对+ Gz暴露引起的认知功能障碍负责。多年来，飞行员增强对加速力的认识并知道如何应对的能力提高了对G力的适应性。