The Siesta Group is a comprehensive service provider supporting the measurement of sleep, wakefulness and brain activity in clinical trials and research. This encompasses, among others, high quality services concerning polysomnography (PSG), pharmaco-electroencephalography (pharmaco-EEG) , event-related potentials (ERP) and actigraphy. The Siesta Group’s services range from consultation, site selection, site training, centralized data scoring and analysis, data quality control, to device rentals. Innovative software technology, secure data transfer, state-of-the-art scientific know-how and flexible processes, all compliant with ICH-GCP and other regulation, ensure the best possible endpoints in measuring sleep, wake and brain activity in a trial. The Siesta Group is the developer of Somnolyzer 24x7, the world’s most reliable and valid tool for computer-assisted sleep scoring. For clinical and diagnostic purposes, Somnolyzer 24x7 is now owned and marketed by Philips-Respironics. The use of Somnolyzer and its related EEG analysis tools in a clinical trial ensures a quality of endpoints unsurpassed by other providers in the field.