bicameral mind

noun1

1. •
   The hypothetical mentality, neurology and sociology of the theory that before the historical emergence of introspective consciousness ancient humans and the earliest civilizations were governed by auditory hallucinations ‘spoken’ by the right cerebral hemisphere and ‘heard’ by the left hemisphere as the voices of gods.

   • The present paper provides a brief summary of the bicameral mind model, followed by a critical reappraisal of […] the putative cerebral basis of bicamerality. — 2007