The central role of the parietal lobes in consciousness

There are now various approaches to understand where and how in the brain c onsciousness arises from neural activity, none of which is universally acce pted. Difficulties among these approaches are reviewed, and a missing ingre dient is proposed here to help adjudicate between them, that of "perspectiv alness." In addition to a suitable temporal duration and information conten t of the relevant bound brain activity, this extra component is posited as being a further important ingredient for the creation of consciousness from neural activity. It guides the development of what is termed the "Central Representation," which is supposed to be present in all mammals and extende d in humans to support self-consciousness as well as phenomenal consciousne ss. Experimental evidence and a theoretical framework for the existence of the central representation are presented, which relates the extra component to specific buffer working memory sites in the inferior parietal lobes, ac ting as attentional coordinators on the spatial maps making up the central representation. The article closes with a discussion of various open questi ons. (C) 2001 Academic Press.