In terms of brain wiring, the primary neuroanatomical features that are strongly associated with human consciousness are found in all mammalian species. There is a six-layered cortex, a thalamus that is strongly interconnected with this cortex, a deep-lying brainstem, and a host of other shared features – including neurotransmitter systems – which are consistently implicated, in humans, in the moment-to-moment flow of conscious experience.
