Abstract Cognitive abilities are impaired by sleep deprivation and can be recovered when sufficient is obtained. Changes in alpha-band oscillations considered to closely related deprivation. In this study, power spectrum, source localization functional connectivity analyses were used investigate the changes resting-state activity after normal sleep, recovery sleep. The results showed that global alpha spectrum decreased activation was notably reduced precuneus, posterior cingulate cortex,...

Most studies on the effects of light exposure have been conducted with continuous light. The present study investigated intermittent sleepiness, mood, electroencephalographic activity during sleep and performance next morning. Fifteen volunteers were scheduled to come laboratory experience different lighting conditions: bright light, dim Subjective sleepiness mood assessed exposure, recording sleep. After waking morning, participants filled out questionnaires went through two cognitive...

Abstract Phase-amplitude coupling (PAC) across frequency might be associated with the long-range synchronization of brain networks, facilitating spatiotemporal integration multiple cell assemblies for information transmission during inhibitory control. However, sleep problems may affect these cortical transmissions based on cross-frequency PAC, especially when humans work in environments social isolation. This study aimed to evaluate changes theta–beta/gamma PAC task-related...

As emerging technologies have advanced, some countries issued reports on human performance enhancement efforts in recent years. Human is a prominent theme the military field. type of potentially disruptive technology, technology (HPET) vital importance promoting combat effectiveness, developing national defense science and transforming medicine. This paper analyzes current development status critical HPETs, examines challenges facing such development, points out existing problems Finally,...

Abstract BackgroundCognitive abilities are impaired by sleep deprivation and can be recovered when sufficient is obtained. Changes in alpha-band oscillations considered to highly related deprivation. The effect of on brain activation functional connectivity the resting-state alpha band remains unclear. purpose this study was investigate how recovery could change neural oscillations.MethodsIn study, thirty young, healthy participants obtained approximately 8 h normal sleep, followed 36 On...

The safety of crews is the primary concern in manned lunar landing project, particularly during re-entry as spacecraft returns from a direct Lunar-Earth trajectory. This paper analyzed crew's chest biomechanical response to assess potential injuries caused by acceleration loads phase. Initially, sophisticated finite element model was constructed, whose effectiveness verified experiments involving vertebral range motion, rib lateral rupture, and frontal impact. then subjected return...

The inclination angle of the spacecraft seat is related to astronaut's reentry angle, which in turn affects safety astronauts. This study quantitatively analyzed effects different angles on astronauts' lumbar spine injuries using finite element method during Lunar-Earth reentry. Firstly, a model was constructed based reverse engineering technology, and effectiveness verified through mesh sensitivity, vertebral range motion, spinal impact experiments. Then, simulation calculations were...

Abstract Rhythmical oscillations of neural populations can reflect working memory performance. However, whether neuronal the cerebral cortex change in extreme environments, especially a space station, remains unclear. Here, we recorded electroencephalography (EEG) signals when volunteers and astronauts were executing task conditions. Our experiments showed that two conditions affect manifest different ways. Lengthy periods mental work impairs gating mechanism formed by theta-gamma...

At present, many scientific experiments are carried out in extreme conditions. Pilots need to perform high-intensity tasks for a long time. Human error is an essential factor affecting mission execution. To deeply study the physiological characteristics of different erroneous states consciousness, we used improved double-choice Oddball paradigm collect brain electrophysiological signals volunteers and pilots missions analyze event-related potential (ERP), time-frequency, function spectrum,...

Cerebral blood flow (CBF) is responsible for oxygen and nutrient delivery to the brain clearance of byproducts metabolism. CBF an important biomarker health function. Transcranial Doppler ultrasound (tCD), which ease-of-use, non-invasiveness, excellent temporal resolution, utilized monitor CBF. However, tCD relatively expensive bulky, not convenient outdoor setting. In this study, bioimpedance technology was adopted assess taking as a reference. A low-cost, portable, battery powered,...