Effects of sleep deprivation on ERP

Sleep deprivation exists extensively in everyday life. It makes cognition functions lower. And vigilance level is affected significantly. In this research, we used discern task by Oddball to study ERPs of 32 young males in different sleep deprivation conditions (sleep deprived for 21 hours, sleep deprived for 45 hours, sleep deprived for 69 hours, normal subjects). Results proved that after sleep deprivation, amplitudes of ERP lowered, latencies prolonged, brain area affected enlarged. So ERP is the good index to indicate the lowered vigilance level after SD