ABSTRACT
In recent years a great deal of attention has been paid to the investigation of the forebrain cholinoreactive systems. These systems are involved in many important processes, such as learning, memory, attention, and the sleep-wake cycle (McCormick, 1990).The sources of cholinergic projections in forebrain structures are the cholinergic depots. The main cholinergic depot for forebrain structures is Nucleus basalts magnocellularis (Nucleus of Meynert) (Mesulam et al., 1983).
