<prompt> What are the EEG waves record for parietooccipital region with subject awake eye closed?Alpha wavesBeta wavesDelta wavesTheta waves  <response>: In adult humans who are awake but at rest with the mind wandering and eyes closed the most prominent component of EEG is a fairly regular pattern of waves at a frequency of 8-13 Hz and amplitude of 50-100uV, this pattern is the alpha rhythm. Ref: Ganong;s review of medical physiology; 23rd edition; pg:233 