Neurophysiology of cognition

What we cognite seems to us self-evident. In the very process of doing what I am doing, cognition appears to me as my immediate experience. I perform an act of knowledge when I act in a manner that I describe as a manipulation or handling of the world in which I exist. The cogito ergo sum of Descartes grasps this and gives to the experience of knowledge a central role: the cogito, the act of cognition, is for Descartes the starting point. Or, in other words, cognition is a human property and no question arises about cognition as a phenomenon. This I wish to change. I wish to present the way in which I make cognition a problem, and how I answer the question, “What phenomenon is the phenomenon of cognition?”