This paper is a summary and extension of almost four decades of research directed toward an explication of the human mind. To achieve a precise, testable proposition that defines mind, I follow a historically rich tradition of materialism. First, an empirical basis is established wherein electropsychologically measured events from the brain, eyes, somatic and speech musculature occur almost simultaneously during a variety of cognitions. The inference is that these covert reactions form components of neuromuscular circuits governed by cybernetic principles. Conversely, (...) when the striated musculature is totally inactive, cognitions are absent. The conclusion is that muscular components of the circuits are necessary for cognitions. An explication of the human mind emerges as the selective interaction of bodily systems to generate contents of mind and to program covert and overt behavior. Clinical and educational applications follow. (shrink)