The notion that the mind and cognitive abilities including memory are present in different areas of the brain and also other organs has a long tradition; it first was considered by pre-Socratic philosophers like Demokrit (460-371 BC) and Plato (428-347 BC) Demokrit presented the hypothesis that soul, psyche, and vitality together form the mind, which is composed of great atoms that are concentrated in the brain, the heart, and the liver On the basis of Demokrit's theory, Plato assumed that the brain is the ruler over the rest of the body Galen (129-199) further expanded on the old Greek hypotheses and proposed the concept of different cells being responsible for the mind. The first cell was called the sensus communis (the confluence of all sensorial information) and was localized in the frontal lateral ventricles, since at this time the cortex was considered a protective shell. The content of the first cell was then combined with phantasm and imagination and supported by motivation and rational thinking.
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