Review of neurotransmitters and neuromodulators qualitative distribution across sleep stages: hypothesis to their role in generating specific sleep oscillations

Sleep is a fundamental part of all living beings. The electrophysiological changes during sleep are seen as different brain oscillations, and these oscillations have for a long time been the hallmark of the different sleep stages. Although these brain oscillations have been registered for several decades ago, their functions seem to be not so well understood even today. Therefore, I wanted to do a literature study on what we know currently on the relation between brain oscillations, neurotransmitters and neuromodulators, this with the aim to get a better understanding of sleep