Other Altered States of Consciousness

The stream of human consciousness appears to be interruptible, in that we can experience a sensation of ‘returning to ourselves after an absence of content’ (e.g. sleep, anaesthesia, full-absorption meditation). Prima facie, such evidence poses a challenge to simple applications of theories of consciousness based on electromagnetic or neural activity in the brain, because some of this activity persists during periods of interruption. This paper elaborates one of several possible responses to the challenge. We build on a previous theory in (...) which EM field topology delineates complex macrophenomenal experience. We first apply an analytic lens to identify different ways in which field topologies might generate sensations of ‘absence of content’. We then test the feasibility of a particular phenomenological approach for assessing those field topologies, powered by the unusual lucidity about cessation pathways induced via certain meditation practices and psychedelic dosages. We build computational simulations of these cessation pathways and test them on eight interviewees with various levels of experience in cessation states. We conclude that this approach can generate usable insight, but requires further formalisation to fulfil its potential. The findings tentatively support our claims but the theory remains speculative at this stage. We set out empirical tests with 11 specific predictions, both for further phenomenological research and for brain manipulation research. Although they align neatly, our ontological and cessation theories can also be separated. The paper describes how our theories can be consistent with other perspectives on consciousness, such as variants of predictive processing or global network theory. (shrink)

Contents: -/- 1. Introduction 2. Ayahuasca in the treatment of bipolar disorder with psychotic features 3. Ayahuasca in the treatment of chronic childhood sexual abuse in a religious community 4. Indigenous ayahuasca ceremonies in the European context 5. Touch and play — ’spiritual attacks’ in ayahuasca ceremonies 6. The clinical trial as a ritual. -/- See also the companion volume 'Psychedelic therapy in practice'.

This compilation focuses on success stories—cases of courage, innovation, and the application of knowledge and power in overcoming illness and suffering. It features twelve ethnographic case studies that describe how people were able to alleviate or overcome serious issues including alcoholism, severe anxiety and depression, suicidal behavior, and psychotic disorders caused by ignorance, neglect, violence, war, and sexual abuse. It is a tribute to the possibility of healing. -/- See also the companion volume 'Ayahuasca revisited: Case studies & observations'.

Investigation of Indigenous concepts and their meanings is highly inspirational for contemporary science because these concepts represent adaptive solutions in various environmental and social milieus. Past research has shown that conceptualizations of consciousness can vary widely between cultural groups from different geographical regions. The present study explores variability among a few of the thousands of Indigenous cultural understandings of consciousness. Indigenous concepts of consciousness are often relational and inseparable from environmental and religious concepts. Furthermore, this exploration of variability reveals the (...) layers with which some Indigenous peoples understand their conscious experience of the world. Surprisingly, Indigenous understandings of global consciousness was found not to be in opposition to local consciousness. The final concluding section of this study discusses the usability of Indigenous concepts and meanings for recent scientific debates. (shrink)

Indigenous understandings of consciousness represent an important inspiration for scientific discussions about the nature of consciousness. Despite the fact that Indigenous concepts are not outputs of a research driven by rigorous, scientific methods, they are of high significance, because they have been formed by hundreds of years of specific routes of cultural evolution. The evolution of Indigenous cultures proceeded in their native habitat. The meanings that emerged in this process represent adaptive solutions that were optimal in the given environmental and (...) social milieu. We argue that it would not be appropriate to handle these meanings as something that science considers to be wrong, or outdated relics of the human past. In contrast, Indigenous concepts and their meanings may be considered to be an important heritage of native human populations, but moreover, they are also an interesting material for analyses and inspiration for recent scientific debates. Furthermore, it is also necessary to mention another reason why the exploration of Indigenous concepts has been so topical recently. Thus far, much psychological theoretical development has been published in English as a result of research conducted in Western countries. The dominance of English and the superiority of research conducted by researchers from Western countries may be considered as a kind of barrier toward other ways of knowing. We argue that the traditional cultural knowledge coming from Indigenous societies may offer an interesting source of new thought for science. The weakening of the strong dependence of science on well-established academic circles dominated by Western theoretical perspectives may be beneficial for stimulating its further development (Sidik, 2022). Therefore, this special symposium of the Journal of Consciousness Studies aims to open the doors for other ways of knowing, For the knowing that emerged in native Indigenous cultures. We argue that the rich cultural heritage of these societies may stimulate the emergence of new analytical perspectives for scientific theorising about the nature of consciousness. For all these reasons, the Indigenous concepts of consciousness captured our interest, and we decided to start investigating them. In 2020 and 2021, we retrieved and analysed pieces of information from past ethnographical field evidence gathered in various Indigenous cultures. After removal of data about the cultures showing a high acceptance of influences from external religious traditions (e.g. Christianity, Islam or Buddhism), a comparative analysis of data from 55 Indigenous groups was conducted and published in the Journal of Consciousness Studies (Trnka and Lorencova, 2022). This primary project revealed many interesting results, but more importantly, it also showed many unexplored avenues that called for further exploration. This special symposium of the Journal of Consciousness Studies is a continuation and new development of research on the Indigenous understanding of consciousness. Past ethnographical evidence involved some valuable pieces of knowledge about Indigenous concepts of consciousness, but the relevant information was often fragmentary or even totally missing in some cases. Moreover, many authors of past ethnographic records applied a strong etic approach that clouded the understanding of native Indigenous thoughts. Therefore, the main goal of the recent symposium was to broaden the overall information basis for the analysis of Indigenous concepts of consciousness or closely related phenomena. In other words, the symposium aimed to bring more detailed knowledge of Indigenous concepts of consciousness, mind and body and their relations in various groups of Indigenous people. In 2022, we contacted potential contributors and were pleased by their positive reactions, which reflected the topicality of this research focus. The authors were asked to draft their papers with a special focus on (a) a cultural Indigenous understanding of the concept of consciousness, (b) a cultural Indigenous understanding of the mind-body differentiation (or consciousness-body differentiation) and (c) cultural metaphors and cultural beliefs related to consciousness, mind and body. Many of contributors were native members of Indigenous cultures that made the descriptions of Indigenous concepts more accurate and reliable. This enabled many truly emic, in-depth insights into the Indigenous concepts of consciousness and related phenomena to be gained. As a result, this issue of the Journal of Consciousness Studies introduces eight papers, each focused on a different geographical region/Indigenous groups: Nahua and Maya (Mexico), Guna (Panama), Mapuche (Chile), Maori (New Zealand), Telingit (Altai), Mongolian groups, Igbo (Nigeria) and Asabano (New Guinea). These papers are followed by one more general paper discussing magical consciousness on the case of an Aboriginal wise man (Australia). The symposium closes with our concluding editorial essay, which generalises the findings and introduces three theoretical models of understandings of consciousness inspired by the analysis of Indigenous concepts of consciousness. Aside from the importance for basic research, the exploration of Indigenous concepts of consciousness is also very important for informing practitioners from many applied spheres. Many current methods for treating addictions, traumatic life events, professional burnout and other mental health problems use features of Indigenous healing practices. A proper understanding of meanings related to mind, body and consciousness are quite important for Western psychotherapists to adapt the Indigenous practices to particular Western cultural milieus. Furthermore, a proper understanding of meanings related to mind, body, and consciousness is also important for treating ethnic, linguistic and culturally diverse populations (APA, 1990). For therapists, psychologists and physicians, understanding the meanings of these concepts may promote their own better care of their clients from various Indigenous ethnic groups. Last but not least, Indigenous concepts, meanings and languages are closely related to the continuation of the heritage of Indigenous people (United Nations, 2016). The world’s Indigenous languages have recently been under threat of disappearing; many Indigenous languages are endangered globally, and the rate of loss is high (United Nations, 2016). Importantly, recent research has also shown that the retention of Indigenous languages may be protective for the psychological and physical health of their speakers. All these areas represent fields for potential use of the findings presented in this symposium of the Journal of Consciousness Studies. As a concluding note, the editors of this symposium hope that this collection of papers will inspire academic scholars while also providing important information for practitioners from various spheres. (shrink)

Different cultures show different understandings of consciousness, soul, and spirit. Native indigenous traditions have recently seen a resurgence of interest and are being used in psychotherapy, mental health counselling, and psychiatry. The main aim of this review is to explore and summarize the native indigenous concepts of consciousness, soul, and spirit. Following a systematic review search, the peer-reviewed literature presenting research from 55 different cultural groups across regions of the world was retrieved. Information relating to native concepts of consciousness, soul, (...) and spirit were excerpted from the sources and contrasted. Contrasting these indigenous concepts revealed important implications for understanding consciousness within a cross-cultural perspective and has practical implications for applied approaches utilizing native indigenous traditions. (shrink)

This article describes a case of a teenager with early complex trauma due to chronic domestic violence. Cannabis use triggered auditory hallucinations, after which the teenager was diagnosed with an acute schizophrenia-like psychotic disorder. Antipsychotic medication did not fully resolve symptoms. Eventually the teenager chose to self-medicate with LSD in order to resolve a suicidal condition. The teenager carried out six unsupervised LSD sessions, followed by an extended period of almost daily use of inhaled low-dose DMT. Psychotic symptoms were mostly (...) resolved after approximately one year. Subsequent cannabis use caused a transient relapse. -/- While his psychosis may have been due to cannabis use in the presence of a genetic predisposition, LSD and DMT did not promote psychotic symptoms in this case, and resolved the suicidal condition in one session. Additional high-dose LSD sessions and low-dose DMT sessions appeared to resolve the symptoms related to the early complex trauma. Alternatively, if psychosis is understood as a massive defense system resulting from early complex trauma, and if his psychotic symptoms were partially due to such trauma, psychedelics appeared to transcend this defense system, providing access to traumatic memories in order to allow for an integrative treatment effect. -/- Information was acquired from medical record excerpts provided by the patient, a semi-structured retrospective video interview, and follow-up interviews a year later. The present case suggests a need for further studies on the relationship between psychedelics and psychotic disorders, the feasibility of supervised vs unsupervised settings for various situations, and alternative therapeutic models for utilizing the hyperaware-hypersensitive state induced by psychedelics. With regard to self-treatment, a harm reduction approach should be adopted. Low-risk psycholytic self-treatment protocols could be developed for future use in public health care systems. (shrink)

In this essay I explore the notion of philosophy as a way of life as a recovery pathway for individuals in addiction recovery. My hypothesis is that philosophy as a way of life can be a compelling, and legitimate recovery pathway for individuals in addiction recovery, as one of many recovery pathways. I will focus on logic-based therapy applied in the context of addiction recovery. The aim of presenting a case study is to show how a client receiving LBT is (...) provided with techniques and a worldview that can contribute to a philosophically oriented recovery program. In the case study the client was advised to apply the moral philosophy of Friedrich Nietzsche as an uplifting philosophical framework to counteract his unproductive worldview and fallacious thinking. Considering that there is an ostensibly low efficacy rate for the treatment of addiction, articulating the value of philosophy as a way of life as a recovery pathway provides a conceptual and methodological framework for the development of novel philosophically-based addiction treatment and recovery-oriented programs—thus expanding the treatment and recovery options available for those seeking recovery from addiction. (shrink)

This chapter examines the integrative nature of reflexive monism (RM), a psychological/philosophical model of a reflexive, self-observing universe that can accommodate both ordinary and extraordinary experiences in a natural, non-reductive way that avoids both the problems of reductive materialism and the (inverse) pitfalls of reductive idealism. To contextualize the ancient roots of the model, the chapter touches briefly on classical models of consciousness, mind and soul and how these differ in a fundamental way from how mind and consciousness are viewed (...) in contemporary Western philosophy and psychological science. The chapter then travels step by step from such contemporary views towards reflexive monism, and towards the end of the chapter, to more detailed comparisons with Hindu Vedanta and Samkhya philosophy and with Cosmopsychism (a recently emergent, directly relevant area of philosophy of mind). According to RM there never was a separation between what we normally think of as the “physical world” and what we think of as our “conscious experience”. In terms of its phenomenology, the phenomenal physical world is part-of conscious experience not apart-from it. This phenomenal world can be thought of as a biologically useful representation of what the world is like, although it is not the world as-described-by modern physics, and it is not the thing itself—supporting a form of indirect (critical) realism. The analysis then outlines how 3D phenomenal worlds are constructed by the mind/brain, focusing specifically on perceptual projection, and then demonstrates how normal, first-person conscious experiences (e.g. of phenomenal worlds) and their associated, third-person viewable neural correlates can be understood as dual manifestations of an underlying psychophysical mind, which can, in turn, be understood as a psychophysical form of information processing. This dual-aspect monism combines ontological monism with a form of epistemological dualism in which first- and third-person perspectives on the nature of mind are complementary and mutually irreducible—a principle that turns out to have wide-ranging applications for the study and understanding of consciousness. The chapter then considers the evolution and wider distribution of consciousness (beyond humans) through a brief analysis of the many forms of discontinuity theory versus continuity theory and argues that to avoid the “hard problem” of consciousness one may need to treat its existence as fundamental, and, as co-evolving with the evolution of its associated material forms. This, in turn, takes one to a central issue: What does consciousness actually do? The analysis argues that its central function is to real-ize existence (to know it in a way that makes it subjectively real). With these foundations in place we then come to the heart of the essay—the ways in which reflexive monism provides a very different view of the nature of the universe to those offered either by dualism or materialist reductionism. As summarised in the last paragraph of this section, “In this vision, there is one universe (the thing-itself), with relatively differentiated parts in the form of conscious beings like ourselves, each with a unique, conscious view of the larger universe of which it is a part. In so far as we are parts of the universe that, in turn, experience the larger universe, we participate in a reflexive process whereby the universe experiences itself.” The essay then considers the precise ways in which this reflexive monist understanding of “consciousness” and “mind” relates to later developments in Vedic philosophy and suggests a way of bridging contemporary Western and classical Vedic ways of understanding consciousness and mind. Finally, the chapter considers what can be said of mystical experience and the ground of being, following the principle that this ground must have the power to both manifest the universe in the form that science shows it to be and our ability to experience the universe in the way that we do. In this, RM is shown to be a dual-aspect monist form of cosmopsychism—a recent area of development within philosophy of mind. The essay compares and contrasts this with idealist versions of cosmopsychism and argues that RM allows for an integrated understanding of realism versus idealism, dualism versus monism, how ordinary experience relates to mystical experience, and how consciousness relates to mind. RM also provides an ‘open’ conceptual system that can, in principle, incorporate a range of parapsychological effects. (shrink)

The ontological turn or ontologically-oriented approach accentuates the key importance of intercultural variability in ontologies. Different ontologies produce different ways of experiencing the world, and therefore, participation in alternative realities is very desirable in anthropological and ethnological investigation. Just the participation in alternative realities itself enables researchers to experience alterity and ontoconceptual differences. The present study aims to demonstrate the power of ritual in alteration, and to show how co-experiencing rituals serves to uncover ontological categories and relations. We argue that (...) the experience of alterity in everyday activities is of a different quality than the experience of alterity when participating in rituals. Transcendent reality is accessible during rituals. It serves as source of potentialities. These potentialities are actualized in ritual and entangled with people's everyday existence. Furthermore, we argue that participating in ritual enables the researcher to step into the alterity of alterity, and to get nearer to the origins of ontologies. Ritual participation also invokes the extension of consciousness and provides a collectively shared cognition, opening up the ontological dimension and enabling access to existential experiences and concepts. In these settings, relations between people and the world can be recognized and investigated. (shrink)

Singh's cultural evolutionary theory posits that methods of inducing shamanic altered states of consciousness differ, resulting in profoundly different cognitive states. We argue that, despite different methods of induction, altered states of consciousness share neurophysiological features and cause shared cognitive and behavioral effects. This common foundation enables further cross-cultural comparison of shamanic activities that is currently left out of Singh's theory.

Currently there is such a cornucopia of conflicting theories in the field of addiction studies that it has become exceedingly difficult for treatment providers, therapists, and policymakers to integrate this vast field of knowledge into effective treatment. Since such a chaotic overabundance of treatment theories, styles, and definitions cloud the field of addictionology, many therapists claim their field is in need of a paradigm shift. In the last 20 years an integrative and compound model has emerged known as the biopsychosocial (...) model, but without a solid and comprehensive meta-framework, syncretistic confusion can result when therapists pick and choose techniques without direction or an overall rationale. To address this problem, Guy du Plessis applies integral theory as a conceptual framework for understanding addiction, as well as a meta-therapeutic framework for therapists. The integral foundation of addiction outlined in this book provides researchers, academics, treatment providers, policy makers, and therapists with a conceptual architectonic of addiction and its treatment that is integrative, inclusive, and practical. An Integral Foundation for Addiction Treatment belongs on the shelf of every addiction treatment therapist, and anyone else who is impacted or influenced by the topic. (shrink)

Seeking treatment for substance abuse or addiction is half the battle--staying sober is the other. In this important book, physician Stanley Block and addiction specialist Guy du Plessis present a powerful program for overcoming addiction utilizing the mind-body bridging modality. Proven effective in both clinical and research settings, these easy-to-use self-help exercises teach readers how to uncover addiction triggers, stay grounded, and prevent future relapse.

In this article I want to tell about the concept of multidimensional communication pioneered in Holoscendence, an integral meta-method of human development, first introduced and developed by Sergey Kupriyanov, PhD in Medicine, a Russian-born Integral therapist from Helsinki, Finland (Kupriyanov 2013).

Psychological effects of perception of music by 63 normal young Russian city dwellers were studied. Stress coping strategies, primitive in functional and ontogenetic terms (confrontation, avoidance) were demonstrated to be primarily affected, as well as such basic psychological defense mechanisms, as suppres- sion. Differences in the effects of perception of the traditional (light European classical) music and the non-traditional (contemporary designer) one were traced back, primarily at the level of general psycho- logical tension. As a result, possible psychological me- chanisms (...) supporting the adaptive function of culture, are discussed. (shrink)

Contemporary theories of self-consciousness typically begin by dividing experiences of the self into types, each requiring separate explanation. The stereotypical case of an out of body experience may be seen to suggest a distinction between the sense of oneself as an experiencing subject, a mental entity, and a sense of oneself as an embodied person, a bodily entity. Point of view, in the sense of the place from which the subject seems to experience the world, in this case is tied (...) to the sense of oneself as a mental entity and seems to be the ‘real’ self. Closer reading of reports, however, suggests a substantially more complicated picture. For example, the ‘real’ self that is experienced as separate from the body in an OBE is not necessarily experienced as disembodied. Subjects may experience themselves as having two bodies. In cases classed as heautoscopy there is considerable confusion regarding the apparent location of the experiencing subject; is it the ‘real mind’ in the body I seem to be looking out from, or is it in the body that I see? This suggests that visual point of view can dissociate from the experience of one’s own “real mind” or experience of self-identification. I provide a tripartite distinction between the sense of ownership, the sense of embodiment and the sense of subjectivity to better describe these experiences. The phenomenology of OBEs suggests that there are three distinct forms of self-consciousness which need to be explained. (shrink)

The therapeutic potential of meditation for physical and mental well-being is well documented, however the possibility of adverse effects warrants further discussion of the suitability of any particular meditation practice for every given participant. This concern highlights the need for a personalized approach in the meditation practice adjusted for a concrete individual. This can be done by using an objective screening procedure that detects the weak and strong cognitive skills in brain function, thus helping design a tailored meditation training protocol. (...) Quantitative electroencephalogram (qEEG) is a suitable tool that allows identification of individual neurophysiological types. Using qEEG screening can aid developing a meditation training program that maximizes results and minimizes risk of potential negative effects. This brief theoretical–conceptual review provides a discussion of the problem and presents some illustrative results on the usage of qEEG screening for the guidance of mediation personalization. (shrink)

Anthropologists working on altered states of consciousness (ASC) have suggested that we should do away with psychologizing concepts and use people's own terms for these experiences. With material drawn from the Orang Sakai of Sumatra this paper shows that practitioners who utilize ASC do recognize the alteration of states of awareness as preconditions for numinous interactions. Also critically discussed is the term ASC.

Cannabis acutely increases schizotypy and chronic use is associated with elevated rates of psychosis. Creative individuals have higher levels of schizotypy, however links between cannabis use, schizotypy and creativity have not been investigated. We investigated the effects of cannabis smoked naturalistically on schizotypy and divergent thinking, a measure of creativity. One hundred and sixty cannabis users were tested on 1 day when sober and another day when intoxicated with cannabis. State and trait measures of both schizotypy and creativity were administered. (...) Quartile splits compared those lowest and highest in trait creativity. Cannabis increased verbal fluency in low creatives to the same level as that of high creatives. Cannabis increased state psychosis-like symptoms in both groups and the high creativity group were significantly higher in trait schizotypy, but this does not appear to be linked to the verbal fluency change. Acute cannabis use increases divergent thinking as indexed by verbal fluency in low creatives. (shrink)

Cortex functional connectivity associated with hypnosis was investigated in a single highly hypnotizable subject in a normal baseline condition and under neutral hypnosis during two sessions separated by a year. After the hypnotic induction, but without further suggestions as compared to the baseline condition, all studied parameters of local and remote functional connectivity were significantly changed. The significant differences between hypnosis and the baseline condition were observable (to different extent) in five studied independent frequency bands (delta, theta, alpha, beta, and (...) gamma). The results were consistent and stable after 1 year. Based on these findings we conclude that alteration in functional connectivity of the brain may be regarded as a neuronal correlate of hypnosis (at least in very highly hypnotizable subjects) in which separate cognitive modules and subsystems may be temporarily incapable of communicating with each other normally. (shrink)

Cognitive functions associated with the frontal lobes of the brain may be specifi cally involved in hypnosis. Thus, the frontal area of the brain has recently been of great interest when searching for neural changes associated with hypnosis. We tested the hypothesis that EEG during pure hypnosis would differ from the normal non-hypnotic EEG especially above the frontal area of the brain. The composition of brain oscillations was examined in a broad frequency band (130 Hz) in the electroencephalogram (EEG) of (...) a single virtuoso subject. Data was collected in two independent data collection periods separated by one year. The hypnotic and non-hypnotic conditions were repeated multiple times during each data acquisition session. We found that pure hypnosis induced reorganization in the composition of brain oscillations especially in prefrontal and right occipital EEG channels. Additionally, hypnosis was characterized by consistent rightside-dominance asymmetry. In the prefrontal EEG channels the composition of brain oscillations included spectral patterns during hypnosis that were completely different from those observed during non-hypnosis. Furthermore, the EEG spectral patterns observed overall during the hypnotic condition did not return to the pre-hypnotic baseline EEG immediately when hypnosis was terminated. This suggests that for the brain, the return to a normal neurophysiological baseline condition after hypnosis is a time-consuming process. The present results suggest that pure hypnosis is characterized by an increase in alertness and heightened attention, refl ected as cognitive and neuronal activation. Taken together, the present data provide support for the hypothesis that in a very highly hypnotizable person (a hypnotic virtuoso) hypnosis as such may be accompanied by a changed pattern of neural activity in the brain. (shrink)

Introduction TRANCE began to interest me when, in 1957, a friend and I went to see a hypnotist so that I could learn to hypnotize him. ...

The interest of this is threefold. First, patients with altered states of consciousness continue to represent a major clinical problem in terms of clinical assessment of consciousness and daily management.

What happens when a worldly Israeli cognitive psychologist goes to the Amazon Basin where he ingests the famed psychotropic concoction Ayahuasca (the ‘vine of the dead’) again and again and again? Our intrepid philosophical psychologist is no longer a sprightly youth, maddened for adventure. He is instead an accomplished theoretician with widely published articles (several in this journal) and a noted book (Shanon, 1993) that speak the from the perspective of cognitive (or phenomenological, for Shanon) psychology against the reductive tendency (...) to view the mind’s activities as created by the the brain’s activities. Even before his Amazonian quest, he placed himself in the Gibsonian camp seeing the mind as dynamic intermediary between organism and environment and active participant in both. What did happen is this extraordinary book, a scientific analysis of his own visions and the education of both Shanon’s views and, perhaps, his soul. (shrink)

This book presents an analytic investigation into the nature of cognitive reality. The author explores various manifestations of consciousness with rational and empirical rigor; he begins with more ordinary states such as thinking, sleeping, and dreaming and then continues on with more extraordinary states such as hypnosis, trance, psychedelic experiences, transcendence, and experiences associated with death. This comprehensive overview of altered states examines consciousness from the physiological, cognitive, and experiential points of view. Readers will gain from this text an enriched (...) understanding of consciousness, reality, and the scientific endeavor. (PsycINFO Database Record (c) 2004 APA, all rights reserved). (shrink)

What we perceive is the product of an intrinsic process and not part of external physical reality. This notion is consistent with the philosophical position of transcendental idealism but also agrees with physiological findings on the thalamocortical system. -Frequency rhythms of discharge activity from thalamic and cortical neurons are facilitated by cholinergic arousal and resonate in thalamocortical networks, thereby transiently forming assemblies of coherent oscillations under constraints of sensory input and prefrontal attentional mechanisms. Perception and conscious experience may be based (...) on such assemblies and sensory input to thalamic nuclei plays merely a constraining role in their formation. In schizophrenia, the ability of sensory input to modulate self-organisation of thalamocortical activity may be generally reduced. If during arousal thalamocortical self-organisation is underconstrained by sensory input, then attentional mechanisms alone may determine the content of perception and hallucinations may arise. (shrink)

It is the central hypothesis of this paper that the mental states commonly referred to as altered states of consciousness are principally due to transient prefrontal cortex deregulation. Supportive evidence from psychological and neuroscientific studies of dreaming, endurance running, meditation, daydreaming, hypnosis, and various drug-induced states is presented and integrated. It is proposed that transient hypofrontality is the unifying feature of all altered states and that the phenomenological uniqueness of each state is the result of the differential viability of various (...) frontal circuits. Using an evolutionary approach, consciousness is conceptualized as hierarchically ordered cognitive function. Higher-order structures perform increasingly integrative functions and thus contribute more sophisticated content. Although this implies a holistic approach to consciousness, such a functional hierarchy localizes the most sophisticated layers of consciousness in the zenithal higher-order structure: the prefrontal cortex. The hallmark of altered states of consciousness is the subtle modification of behavioral and cognitive functions that are typically ascribed to the prefrontal cortex. The theoretical framework presented yields a number of testable hypotheses. (shrink)

CHAPTER 1 Neurotransmitter networks Elaine Perry and Allan Young i. Introduction This first chapter sets the scene for subsequent exploration of potential ...

Consists of a description of a multitude of imagery techniques that have been loosely grouped into four major categories: hypno-behavioral, cognitive-behavioral, psychodynamic/humanistic and humanistic/transpersonal.

What happens during a near-death experience? In an accessible style, this text reviews recent research about unbelievable events, creating an account of activity at the boundaries of science. It also examines research concerns, current theories, methodological issues and clinical implications.

This paper considers the neuropsychology of religious and spiritual experiences. This requires a review of our current understanding of brain function as well as an integrated synthesis to derive a neuropsychological model of spiritual experiences. Religious and spiritual experiences are highly complex states that likely involve many brain structures including those involved in higher order processing of sensory and cognitive input as well as those involved in the elaboration of emotions and autonomic responses. Such an analysis can help elucidate the (...) biological correlates of these experiences and provide new information regarding the function of the human brain. (shrink)