Previous studies have shown that misperceptions and illusory experiences can occur if sensory stimulation is withdrawn or becomes invariant even for short periods of time. Using a perceptual deprivation paradigm, we created a monotonous audiovisual environment and asked participants to verbally report any auditory, visual or body-related phenomena they experienced. The data (analysed using a variant of interpretative phenomenological analysis) revealed two main themes: (1) reported sensory phenomena have different spatial characteristics ranging from simple percepts to the feeling of immersion (...) in a complex multisensory environment and (2) the active contribution of the perceiver where participants report engaging in exploratory processes even when there is nothing to find. Detailed analysis of the qualitative data further showed that participants who reported more perceptual phenomena were more likely to report internal bodily sensations, move more during the experiment and score higher on the Revised Hallucination Scale than those reporting fewer percepts explicitly linking perceptual deprivation to somatic phenomena. The results demonstrate how the variety of sensory experiences induced by perceptual deprivation can give further insight into the factors mediating conscious awareness and may suggest ways in which the brain imposes meaning on the environment under invariant sensory conditions. (shrink)

Chakras are a basic concept of yoga but typically are ignored by scientific research on yoga, probably because descriptions of chakras can appear like a fanciful mythology. Chakras are commonly considered to be centers of concentrated metaphysical energy. Although clear physiological effects exist for yoga practices, no explanation of how chakras influence physiological function has been broadly accepted either in the scientific community or among yoga scholars. This problem is exacerbated by the fact that yoga is based on subjective experience, (...) and practitioners often shun objective descriptions. This essay builds on earlier work hypothesizing that intercellular gap junction connections provide a physiological mechanism underlying subtle energy systems described in yoga as well as other disciplines such as acupuncture. Three physical aspects of chakras are distinguished that are integrated through gap junction mechanisms and are proposed to have arisen during embryological development. Furthermore, electrical conductance associated with a high concentration of gap junctions could generate phenomena that, when subjectively experienced, have the radiant qualities attributed to chakras. This theory provides a scientific rationale for previously unexplained details of chakra theory and offers a new orientation to conceptualizing and studying such subjective phenomena. (shrink)

A change in sense of self is an outcome commonly associated with Buddhist meditation. However, the sense of self is construed in multiple ways, and which changes in self-related processing are expected, intended, or possible through meditation is not well understood. In a qualitative study of meditation-related challenges, six discrete changes in sense of self were reported by Buddhist meditators: change in narrative self, loss of sense of ownership, loss of sense of agency, change in sense of embodiment, change in (...) self-other or self-world boundaries, and loss of sense of basic self. Changes in sense of self could be transient or enduring, positive or distressing, enhancing or impairing. These changes were also given varied appraisals, ranging from insights associated with Buddhist doctrines to psychopathologies such as depersonalization. In this study of practitioners reporting meditation-related challenges, more global changes in sense of self were associated with higher levels of impairment. These results have implications for both Buddhist meditation as well as mindfulness-based interventions. (shrink)

First published in English in 1958, the author lays the groundwork for a Western understanding of Yoga, providing a comprehensive survey of Yoga in theory and practice from its earliest antecedents in the Vedas through the twentieth century.

In his exciting and original view of the universe, Itzhak Bentov has provided a new perspective on human consciousness and its limitless possibilities. Widely known and loved for his delightful humor and imagination, Bentov explains the familiar world of phenomena with perceptions that are as lucid as they are thrilling. He gives us a provocative picture of ourselves in an expanded, conscious, holistic universe. _.

This article reviews the most recent information and data regarding brain processes associated with altered states of consciousness. It takes a neurotheological approach, seeking to blend what is known about these states, particularly as they relate to religious and spiritual experiences, in terms of brain processes and subjective elements of the experiences. The overall goal is to provide a comprehensive model that incorporates multiple brain areas including cortical, limbic, and subcortical structures, as well as considers the various neurotransmitters that might (...) be involved. It is the hope that this framework provides a starting point for future investigations into the detailed neurophysiological and phenomenal aspects of altered states of consciousness. (shrink)

Spontaneous Spiritual Awakenings are subjective experiences characterised by a sudden sense of direct contact, union, or complete nondual merging with a perceived ultimate reality, the universe, “God,” or the divine. These profound transformative experiences have scarcely been researched, despite extensive anecdotal evidence suggesting their potential to catalyse drastic, long-term, and often positive shifts in perception, world-view, and well-being. The aims of this study were to investigate the phenomenological variances of these experiences, including the potential differences between SSAs and Spontaneous Kundalini (...) Awakenings, a subset of awakening experiences that the authors postulate may produce a higher likelihood of both physical and negative effects; to explore how these experiences compare to other altered states of consciousness, including those mediated by certain psychedelic substances; and understand their impact on well-being. Personality trait absorption and temporal lobe lability were assessed as predictors of Spontaneous Spiritual and Kundalini Awakenings. A mixed within and between-participants self-report survey design was adopted. A total of 152 participants reporting their most powerful SSA/SKAs completed questionnaires measuring nondual, kundalini, and mystical experience, as well as depth of ASC, and trait absorption and TLL. Spontaneous Kundalini Awakenings were found to be significantly more physical, but not significantly more negative than SSAs, and overall, both sets of experiences were perceived to be overwhelmingly more positive than negative, even in cases where the experience was initially challenging. The phenomenological distribution of SSA/SKAs was similar to other measured ASCs although greater in magnitude, and appeared most similar in distribution and in magnitude to drug-induced ASCs, particularly classic psychedelics DMT and psilocybin. Temporal lobe lability and trait absorption were found to predict the SSA/SKA experience. The limitations and implications of these findings are discussed. (shrink)

The article explores meditation-based examination of experience as a means for developing a contemplative, nonnaturalized, and existentially meaningful empirical research of consciousness in which the experiencing person is regarded as the primary investigator. As the first phase of a broader project, a group of seven researchers carried out a series of five meditation retreats. We sampled the ongoing experience of the researchers at the same random moments during meditation practice. The acquired data, consisting of more than 500 journal entries, interview (...) transcripts, and participatory analysis records, set the ground for three lines of enquiry: (1) What, if any, kind of meditative practice is suitable for researching experience? How can it be cultivated? (2) Can a group of researchers skilled in meditation systematically investigate selected experiential phenomena? (3) What is the actual lived experience of a group of researchers engaged in a continuous meditation-based examination of experience? In this report, we primarily focus on the third question, offering a concrete ethnographic overview of our research enterprise. We conclude by relating our findings to the discussion of the phenomenological practice of the epoché as an empirical tool for the study of consciousness. (shrink)

This article proposes an evolution of Edmund Husserl’s transcendental epoché by integrating P. R. Sarkar’s Tantra sádhaná, which engages ipseity as both the subject and the object of consciousness. First, it explores some of the recent philosophical and scientific obstacles that confound the transcendental reduction. Following this, an East-West trajectory for Husserl’s first science of consciousness is examined by combining Sarkar’s 3 shuddhis in pratyáhára, effecting an experience of noumenal consciousness. Combining Husserl’s phenomenology with Sarkar’s spiritual praxis reinvigorates the transcendental (...) epoché and emphasizes practice in a field both undermined by logical positivism and dominated by the scholasticism of Husserl’s protégés. Furthermore, the efficacy of an East-West approach is contextualized in view of Husserl’s admiration of Buddhism and Sarkar’s cognitive cosmology. (shrink)