What is an altered state of consciousness?

  title={What is an altered state of consciousness?},
  author={Antti Revonsuo and Sakari Kallio and Pilleriin Sikka},
  journal={Philosophical Psychology},
  pages={187 - 204}
“Altered State of Consciousness” (ASC) has been defined as a changed overall pattern of conscious experience, or as the subjective feeling and explicit recognition that one's own subjective experience has changed. We argue that these traditional definitions fail to draw a clear line between altered and normal states of consciousness (NSC). We outline a new definition of ASC and argue that the proper way to understand the concept of ASC is to regard it as a representational notion: the… 

Altered states of bodily consciousness

Concepts such as consciousness and the self have proven notoriously diffi-cult to define and have yielded enormous amounts of literature in a largearray of disciplines (e.g., Bermu´dez, Marcel, &

Whole-Brain Models to Explore Altered States of Consciousness from the Bottom Up

This paper defines altered states of consciousness, discusses relevant signatures of consciousness observed in brain activity, and introduces whole-brain models to explore the biophysics of altered consciousness from the bottom-up.

Perturbations in dynamical models of whole-brain activity dissociate between the level and stability of consciousness

This work developed and analyzed whole-brain computational models to show that the stability of conscious states provides information complementary to their similarity to conscious wakefulness, and leads to a novel methodological framework to sort out different brain states by their stability and reversibility.

A Comparative Study on Altered States of Consciousness in Clinical Hypnosis and Patanjali’s Yoga Sutra

The altered states of consciousness (ASC) in yoga and hypnosis are associated with similar phenomena like relaxation, disinclination to talk, unreality, misrepresentation, alterations in perception,

Bridging the Gap? Altered Thalamocortical Connectivity in Psychotic and Psychedelic States

Recent findings of thalamocortical dysconnectivity, its putative extension to CSPTC circuitry, along with its clinical implications and future directions are discussed.

Weak phantasy and visionary phantasy: the phenomenological significance of altered states of consciousness

In this paper we discuss the definitional problems of altered states of consciousness and their potential relevance in phenomenological investigation. We suggest that visionary states or visionary

Investigating the role of oscillations in endogenous and exogenous attentional states : novel methods in neurophenomenology

The work presented in this thesis aims to extend our scientific understanding of the subtle relationships between our phenomenological experience of specific states of consciousness, and the

Religious Studies , and Chemically-Altered ( Alchemical ) Consciousness

The principal aim of this essay is to explore the influence of chemically-altered, or alchemical consciousness, not only on the founding and ongoing articulation of transpersonal theory, but on the

It's Not Just About the Contents: Searching for a Neural Correlate of a State of Consciousness

Global gamma band synchronisation is perhaps the most extensively studied candidate for a Neural Correlate of Consciousness (NCC) . Yet despite numerous studies confirming its association with



Altered states of consciousness.

  • A. Ludwig
  • Psychology
    Archives of general psychiatry
  • 1966
It is the present intention to integrate and discuss current knowledge regarding various altered states of consciousness in an effort to determine (a) the conditions necessary for their emergence, (b) the factors which influence their outward manifestations, (c) their relatedness and/or common denominators, and (d) the adaptive or maladaptive functions which these states may serve for man.

On a confusion about a function of consciousness

  • N. Block
  • Psychology, Biology
    Behavioral and Brain Sciences
  • 1995
This target article uses as an example a form of reasoning about a function of “consciousness” based on the phenomenon of blindsight, where an obvious function of the machinery of accessconsciousness is illicitly transferred to phenomenal consciousness.

Psychobiology of altered states of consciousness.

The neurophysiological approach revealed that the different states of consciousness are mainly brought about by a compromised brain structure, transient changes in brain dynamics (disconnectivity), and neurochemical and metabolic processes.

Hypnosis and consciousness: A structural model

A model of consciousness and hypnosis is presented which is essentially an evolutionary and hierarchical description of increasingly more sophisticated levels of information processing in vertebrate brains which places the more recently evolved systems that are associated with subjective experience into a more meaningful perspective.

Hypnotic phenomena and altered states of consciousness : A multilevel framework of description and explanation

There is currently agreement that, in addition to the changes in external behaviour, suggestions presented in a hypnotic context may give rise to changes in subjective experience. Yet, there is no

Is hypnosis an altered state of consciousness or what

The debate over whether hypnosis is an altered state of consciousness is a distraction from the real business of studying the phenomena that occur in the context of hypnotic suggestion. These

The psychology of consciousness.

  • S. C. Chang
  • Psychology
    American journal of psychotherapy
  • 1978
Study of meditation is a viable approach to the exploration of both meanings of consciousness, which aims at a "cleansing" of the mind to reach a content-free and conflict-free state--pure consciousness.

Altering the state of the altered state debate: reply to commentaries

The main point of our article ‘Hypnotic phenomena and altered states of consciousness: A multilevel framework of description and explanation’ was to clarify, explicate and reveal the differences