N1 (positive shift in latency), N2 (positive shift in latency and parietal dominance in amplitude) and late components N3 and P3 (negative shifts) were analyzed from the ERPs elicited by tones of 1000 Hz in two post-training sessions separated by 2 weeks. Electroencephalogram, electrooculogram and electrocardiogram were recorded using high-pass digital filtering of 100 Hz and a sampling frequency of 1 kHz. Behavioral data for sleepiness were recorded before and after exposure to 1G or 2G in the head-down tilt position. The spatial and temporal patterns of event-related potentials (ERPs) evoked by auditory stimulation during exposure to hypergravity were studied in nine men aged 17-30 years (mean 22.8). Event-related cortical activity in hypergravity in humans.
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