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The earliest and most ancient brain is our brainstem, which deals in sensation only. In other words the internal communication process or 'language' of the brainstem is through sensation only. Later our limbic system evolved and its language is 'feeling'.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.