The literature has struggled to choose between them for three decades, without success. Researchers Hirschfeld and Gelman propose that because the human mind has evolved by natural selection, it implies that enhanced functionality would develop if it produced an increase in "fit" behaviour.
When Sperry et al. A growing literature has argued for a different interpretation of lateralized frontal activity, with approach and avoidance or the closely related concept of withdrawal motivation as the relevant dichotomy for reviews, see Davidson, ; Harmon-Jones, ; Harmon-Jones et al.
A remarkable precedent of this orientation is the research of Justo Gonzalo on brain dynamics  where several phenomena that he observed could not be explained by the traditional theory of localizations.
By the beginning of the twentieth century, detailed maps were available showing the functions of the different areas of the brain. There was significantly more blood flow and thus activation to human bodies, no matter how detailed, and body parts than to objects or object parts. Voytek et al. Maps of the Mind.
Motor Area The motor area is located in the frontal lobe and is responsible for voluntary movements by sending signals to the muscles in the body. Many studies were undertaken without individual structural MRI which would allow for individual differences in brain structure and before dense-array EEG recording was widely available.