The Mechanisms of Psychedelic Visionary Experiences: Hypotheses from Evolutionary Psychology
Frontiers in Neuroscience – September 28, 2017
Source: OpenAlex
Summary
Psychedelics reliably induce profound mystical experiences, deeply influencing human culture and **cognition**. **Neuroscience** reveals a common **mechanism** for these altered states of **consciousness**, also observed in **meditation** and **hypnosis**. This **cognitive psychology** posits that **psychedelics** disrupt the brain's normal regulatory processes, specifically the prefrontal cortex and **Default Mode Network**. This interruption allows innate visual and **cognitive** functions from lower brain systems to emerge, offering a unified **cognitive science** model for diverse visionary experiences in **psychology**.
Abstract
Neuropharmacological effects of psychedelics have profound cognitive, emotional, and social effects that inspired the development of cultures and religions worldwide. Findings that psychedelics objectively and reliably produce mystical experiences press the question of the neuropharmacological mechanisms by which these highly significant experiences are produced by exogenous neurotransmitter analogs. Humans have a long evolutionary relationship with psychedelics, a consequence of psychedelics' selective effects for human cognitive abilities, exemplified in the information rich visionary experiences. Objective evidence that psychedelics produce classic mystical experiences, coupled with the finding that hallucinatory experiences can be induced by many non-drug mechanisms, illustrates the need for a common model of visionary effects. Several models implicate disturbances of normal regulatory processes in the brain as the underlying mechanisms responsible for the similarities of visionary experiences produced by psychedelic and other methods for altering consciousness. Similarities in psychedelic-induced visionary experiences and those produced by practices such as meditation and hypnosis and pathological conditions such as epilepsy indicate the need for a general model explaining visionary experiences. Common mechanisms underlying diverse alterations of consciousness involve the disruption of normal functions of the prefrontal cortex and default mode network (DMN). This interruption of ordinary control mechanisms allows for the release of thalamic and other lower brain discharges that stimulate a visual information representation system and release the effects of innate cognitive functions and operators. Converging forms of evidence support the hypothesis that the source of psychedelic experiences involves the emergence of these innate cognitive processes of lower brain systems, with visionary experiences resulting from the activation of innate processes based in the mirror neuron system (MNS).