Feedback for High EEG Alpha Does Not Maintain Performance or Mood During Sleep Loss.

摘要

In a previous study, most of the performance and mood measures showed sleep loss impairment regardless of EEG alpha level, but attention and reported sleepiness were less impaired for the high-alpha group (although the differences were of doubtful significance). A constructive replication was carried out. Twenty subjects were allocated equally to Group A, where auditory feedback was contingent on high alpha, and to Group B, where auditory feedback was contingent on low alpha and low theta. All subjects were repeatedly tested on auditory vigilance, addition, immediate recall and feelings of sleepiness for 40 hours during which no sleep was permitted. Sixty minutes of EEG feedback was given during each block of 220 minutes. Group A did produce significantly more alpha for the first 24 hrs but this difference was not maintained. Both groups had significant sleep loss impairment on all measures. There were no significant differences between the groups in the amount of impairment. Self-enhanced EEG alpha activity does not prevent impairment of performance or mood during sleep loss.