Both the pilot study and the main study, the alertness impairments in OSAS patients with the reading activity, a simple spiritual activity were operationalized. In contrast to the MSLT and MWT daytime sleepiness was not measured in an experimental laboratory situation, but in an everyday clinical situation. The Reading Test is suitable for the determination of daytime sleepiness, because it probably produces a low level of attention. The reading activity will be documented and monitored continuously by EOG. Therefore, the non-reading phases can be observed, e.g. at the beginning of sleep, movement and looking around of the patient. In addition, the behaviour spectrum of patients are also detected in the EMG, as unwanted movements (facial grimacing and head movements), which can prevent sleep. This aspect would be particularly relevant in experiments.
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