Study participants
DISEASES
The study cohort consisted of 20 younger (range 21–26 years, 10 women) and 19 older healthy participants (range 40–70 years, 9 women). Before study inclusion, a standard interview about participant’s medical history was conducted to ensure that probands were free of any somatic or mental diseases and did not take any medications, except contraceptives. Further, subjects were not allowed to consume caffeine, nicotine and alcohol at least three hours before each scheduled recording. All experiments were performed in accordance with the Declaration of Helsinki and were approved by the local ethics committee at the University Medical Center Göttingen (protocol number: UMG 27/7/18). Informed consent was obtained from all participants included in the study.