‘Altered states of consciousness’ discusses the states of consciousness during sleep, dreaming, hallucinations, out-of-body experiences, near-death experiences, meditation, and after taking psychoactive drugs. Psychologist Charles Tart defines an altered state of consciousness (ASC) as ‘a qualitative alteration in the overall pattern of mental functioning, such that the experiencer feels his...
‘The human brain’ considers the brain as a vast network of connections from which come our extraordinary abilities: perception, learning, memory, reasoning, language, and somehow or another—consciousness. Different areas deal with vision, hearing, speech, body image, motor control, and forward planning. They are all linked, but this is not done through one central processor, but by millions of...
‘The evolution of consciousness’ begins with two questions. First, which living creatures are conscious and in what way? Secondly, when and how did consciousness evolve? Consciousness could be an all-or-nothing phenomenon, with some creatures having it and others not. Or it might be a continuous variable, with some having more than others. Different theories of evolution of consciousness are...