<P> Humans are corporeal beings and, as such, they are subject to examination and description by the natural sciences . Since mental processes are intimately related to bodily processes, the descriptions that the natural sciences furnish of human beings play an important role in the philosophy of mind . There are many scientific disciplines that study processes related to the mental . The list of such sciences includes: biology, computer science, cognitive science, cybernetics, linguistics, medicine, pharmacology, and psychology . </P> <P> The theoretical background of biology, as is the case with modern natural sciences in general, is fundamentally materialistic . The objects of study are, in the first place, physical processes, which are considered to be the foundations of mental activity and behavior . The increasing success of biology in the explanation of mental phenomena can be seen by the absence of any empirical refutation of its fundamental presupposition: "there can be no change in the mental states of a person without a change in brain states ." </P> <P> Within the field of neurobiology, there are many subdisciplines that are concerned with the relations between mental and physical states and processes: Sensory neurophysiology investigates the relation between the processes of perception and stimulation . Cognitive neuroscience studies the correlations between mental processes and neural processes . Neuropsychology describes the dependence of mental faculties on specific anatomical regions of the brain . Lastly, evolutionary biology studies the origins and development of the human nervous system and, in as much as this is the basis of the mind, also describes the ontogenetic and phylogenetic development of mental phenomena beginning from their most primitive stages . Evolutionary biology furthermore places tight constraints on any philosophical theory of the mind, as the gene - based mechanism of natural selection does not allow any giant leaps in the development of neural complexity or neural software but only incremental steps over long time periods . </P> <P> The methodological breakthroughs of the neurosciences, in particular the introduction of high - tech neuroimaging procedures, has propelled scientists toward the elaboration of increasingly ambitious research programs: one of the main goals is to describe and comprehend the neural processes which correspond to mental functions (see: neural correlate). Several groups are inspired by these advances . </P>

Who proposed the theory that mental processes originated in the brain