The existential crisis of nihilism in schizophrenia has been reported since the early days of psychiatry. Taking first-person accounts concerning nihilistic experiences of both the self and the world as vantage point, we aim to develop a dynamic existential model of the pathological development of existential nihilism. Since the phenomenology of such a crisis is intrinsically subjective, we...
Few studies have investigated hallucinations that occur at the onset/offset of sleep (called hypnagogic/hypnopompic hallucinations; HHHs), despite the fact that their prevalence in the general population is reported to be higher than the prevalence of daytime hallucinations. We utilized data from an epidemiological study to explore the prevalence of HHHs in various modalities. We also...
This article is based on the two verses from the 3rd chapter known as “Advaita Prakaranam” (section of nonduality) of text called “Mandukya Karika” written by the author Gaudapada. At the beginning of the text Gaudapada tells, the problems which human beings have in the world (Samsara) are due to the perception of duality (subject-object duality). He says, the duality causes Samsara (problems...
Psychedelics are a hallucinogenic class of psychoactive drugs with the primary effect of activating non-ordinary states of consciousness. Due to the positive preliminary findings of these drugs in the treatment of psychiatric disorders, the number of registered clinical studies has risen significantly. In this paper, clinical studies registered on clinicaltrials.gov that evaluate the treatment...
Flicker light stimulation can induce short-term alterations in consciousness including hallucinatory color perception and geometric patterns. In the study at hand, the subjective experiences during 3 Hz and 10 Hz stroboscopic light stimulation of the closed eyes were assessed. In a within-subjects design (N = 24), we applied the Positive and Negative Affect Schedule (mood state), time...
"The inquisitiveness about the relation between Consciousness and the phenomenal world has long existed in the area of philosophy and science. Philosophy tries to understand it subjectively whereas science tries to understand it materially. The nature of inquiry differs in both fields. In this paper, I will try to explain the relationship between Consciousness and the phenomenal world from a...
We cast aspects of consciousness in axiomatic mathematical terms, using the\ngraphical calculus of general process theories (a.k.a symmetric monoidal\ncategories and Frobenius algebras therein). This calculus exploits the\nontological neutrality of process theories. A toy example using the axiomatic\ncalculus is given to show the power of this approach, recovering other aspects\nof conscious...
Background: Psilocybin is a psychedelic drug that has shown lasting positive effects on clinical symptoms and self-reported well-being following a single dose. There has been little research into the long-term effects of psilocybin on brain connectivity in humans. Aim: Evaluate changes in resting-state functional connectivity (RSFC) at 1 week and 3 months after one psilocybin dose in 10 healthy...
Stroboscopic stimulation has been previously shown to induce visual hallucinations and altered states of consciousness, state by entraining the brain to the driving frequency, similar to those reported during the psychedelics although little systematic research exists on the effect of specific stimulation frequency on experience. The present study investigated the effects of different...
Background: Meditation-Based Lifestyle Modification (MBLM) is a new mind–body intervention that is based on classical yoga; it implements virtue-based ethical living, physical yoga, and meditation in a therapeutic context. This qualitative study aimed at understanding better how depressive patients who received MBLM as a treatment experience intra- and interpersonal outcomes of their practice....