The relationship between mismatch negativity and arousal level. Can mismatch negativity be an index for evaluating the arousal level in infants?. The relationship between mismatch negativity and arousal level. Can mismatch negativity be an index for evaluating the arousal level in infants?. Download Web Watch – Volume 2 Issue 6 Article reviewed: REM sleep behavior disorder in sleep-disordered patients with versus without Parkinson’s disease: is there a need for polysomnography?