A neurobiological role of music in social bonding

Music is regarded in biological terms as originating in the brain, so that most explanations concentrate on the ways in which brains process information. Studies of the nonlinear dynamics of the primary sensory cortices show that patterns that are constructed by chaotic nonlinear dynamics in cortical neuropil replace stimulus-driven activity. This finding supports the concept that knowledge in brains is entirely constructed within them without direct transfer of information from outside. As knowledge increases by learning, brains of individuals grow progressively apart because of the uniqueness of the knowledge that is constructed within each one. The resulting condition of isolation is known among philosophers as epistemological solipsism. This view is reinforced by the tenets of aesthetics, which emphasize the deeply personal experiences of individuals, not as active listeners but as passive recipients of beauty in music and other arts. Neither conventional neuroscience nor aesthetics can explain the deep emotional power of music to move humans to action. In an alternative view, human brains are seen to have evolved primarily in response to environmental pressures to bridge the solipsistic gulf between individuals and form integrated societies. An evolutionary origin is found in neurohumoral mechanisms of parental bonding to altricial infants. A case is made that music together with dance coevolved biologically and culturally to serve as a technology of social bonding. Findings of anthropologists and psychiatrists show how rhythmic behavioral activities that are induced by drum beats and music can lead to altered states of consciousness, through which mutual trust among members of societies is engendered.