“…The waking state is controlled by several neurobiological networks, including circadian, homeostatic influences as well as by genetic, molecular, neuroanatomical and neurochemical elements [12][13][14]. For example, waking is modulated by the activity of diverse neurotransmitter systems such as noradrenaline, dopamine, serotonin, acetylcholine, histamine and hypocretin [3,[15][16][17][18][19][20][21][22][23][24] (Fig.…”