Postural Stability Change Under Sleep Deprivation and Mental Fatigue Status

Abstract

BACKGROUND: Based on posturography parameters during sleep deprivation (SD), a mental fatigue index (MFI) was constructed for healthy male cadets.METHODS: There were 37 young male subjects who volunteered for two successive days of SD. Their posturography balance, profile of mood status (POMS), and heart rate variability (HRV) were measured at four different times (10:00 and 22:00 of day 1, 10:00 and 22:00 of day 2). According to the methods used in our previous research, similar MFIs based on posturography parameters were computed. Then, correlations of MFIs with POMS scores and HRV values were evaluated by linear and nonlinear methods including quadratic, S-curve, growth, and exponential analyses.RESULTS: MFI continued to increase during SD and MFI as the independent variable had quadratic relationships with fluster (R2 0.057), depression (R2 0.067), and anger (R2 0.05) scores of POMS. A linear correlation was found between MFI and the depression score (R2 0.045) and MFI correlated linearly (R2 0.029) and nonlinearly (R2 0.03) with heart rate. Similarly, MFI reflected changes in the time and frequency domain parameters of HRV, with linear (R2range: 0.0290.082) or nonlinear (R2range: 0.0300.082) relationships.DISCUSSION: The increase of MFI was linked with amplification of personal negative moods and an imbalance of autonomic nervous system activity. The findings suggest that MFI might be a potential indicator of mental fatigue and provide a method to prevent driving fatigue and human errors.Cheng S, Yang J, Su M, Sun J, Xiong K, Ma J, Hu W. Postural stability change under sleep deprivation and mental fatigue status. Aerosp Med Hum Perform. 2021; 92(8):627632.

The influence of sleep deprivation on the cognitive processes in medical students during exam session

“…(podgrupa IA), charakteryzowały się nie tylko znacznie gorszym postrzeganiem bodźców oraz czujnością i koncentracją uwagi na wykonywanym zadaniu, ale także precyzją jego wykonania. Deprywacja snu powodowała uczucie zmęczenia psychofizycznego, co również mogło wpływać na zaburzenia procesów kognitywnych oraz na czas reakcji na bodziec, na co zwracali uwagę także inni autorzy [11,[17][18][19].…”

Acute combined effects of concurrent physical activities on autonomic nervous activation during cognitive tasks

“…While mental workload in most existing research protocols is induced by sleep deprivation ( Cheng et al, 2021 ), continuous cognitive tasks such as an n-back task ( Karthikeyan et al, 2021 ; Wriessnegger et al, 2021 ) and a Stroop task ( Nikooharf Salehi et al, 2022 ), these protocols often overlook the role of non-cognitive variables, particularly physical factors. The real-time evaluation of mental workload based on ECG signals is undoubtedly influenced by dynamics.…”