scholarly journals The Ganzflicker Experience: Rhythmic visual flicker induces complex illusions in people with visual imagery but not aphantasia

2020 ◽  
Author(s):  
Varg Königsmark ◽  
Johanna Bergmann ◽  
Reshanne R Reeder
Keyword(s):  
Visual Imagery ◽  
Visual Stimulation ◽  
Cortical Excitability ◽  
Altered States Of Consciousness ◽  
Imagery Ability ◽  
Altered States ◽  
Fine Grained ◽  
Geometric Patterns ◽  
States Of Consciousness ◽  
Visual Cortical

Rhythmic visual flicker is known to induce illusions and altered states of consciousness. Previous research has suggested that the form of “simple” illusions (e.g., geometric patterns) is constrained by the functional architecture of early visual cortical areas. As of yet, the nature of more “complex” illusions (e.g., naturalistic living and non-living things) is under-represented within the current literature. Very recent findings showed that visual imagery vividness correlates positively with the likelihood to experience anomalous percepts. Here, we tested whether imagery ability is associated with individual differences in both susceptibility to, and complexity of, flicker-induced illusions (FII). We recruited a sample of people with aphantasia (the complete lack of visual imagery) and a sample of people with imagery. We found that people with visual imagery were more susceptible to FII than people with aphantasia. Moreover, moderately-vivid imagers were more likely to see complex FII than weakly-vivid imagers, whereas people with aphantasia only experienced simple FII. People with and without imagery experienced a similar range of emotions during Ganzflicker stimulation, but people with imagery experienced more altered states of consciousness. These findings fit with recent research on the connection between visual imagery strength (specifically, the influence of imagery on perception) and visual cortical excitability. Visual imagery ability and anomalous perceptual experience may depend on the same cortical mechanism that gates effects of visual stimulation on natural cortical excitability levels. Future studies will investigate whether more fine-grained changes in cortical excitability induced by different visual flicker frequencies can modulate FII-susceptibility and FII-complexity.

Sadomasochism as a path to altered states of consciousness

2014 ◽  
Author(s):  
James K. Ambler ◽  
Ellen M. Lee ◽  
Kathryn R. Klement ◽  
Tonio Loewald ◽  
Brad J. Sagarin
Keyword(s):  
Altered States Of Consciousness ◽  
Altered States ◽  
States Of Consciousness

Virtual Unreality

2018 ◽  
Author(s):  
Jonathan Weinel
Keyword(s):  
Virtual Reality ◽  
Video Games ◽  
Drug Use ◽  
Conceptual Model ◽  
Interactive Video ◽  
Altered States Of Consciousness ◽  
Altered States ◽  
States Of Consciousness ◽  
Visual Systems

This chapter explores altered states of consciousness in interactive video games and virtual reality applications. First, a brief overview of advances in the sound and graphics of video games is provided, which has led to ever-more immersive capabilities within the medium. Following this, a variety of games that represent states of intoxication, drug use, and hallucinations are discussed, in order to reveal how these states are portrayed with the aid of sound and music, and for what purpose. An alternative trajectory in games is also explored, as various synaesthetic titles are reviewed, which provide high-adrenaline experiences for ravers, and simulate dreams, meditation, or psychedelic states. Through the analysis of these, and building upon the previous chapters of Inner Sound, this chapter presents a conceptual model for ‘Altered States of Consciousness Simulations’: interactive audio-visual systems that represent altered states with regards to the sensory components of the experience.

Synaesthetic Overdrive

2018 ◽  
Author(s):  
Jonathan Weinel
Keyword(s):  
Subjective Experience ◽  
Visual Media ◽  
Altered States Of Consciousness ◽  
Altered States ◽  
Visual Music ◽  
Background Theory ◽  
States Of Consciousness ◽  
Feature Films ◽  
Expanded Cinema ◽  
Improved Accuracy

This chapter discusses altered states of consciousness in audio-visual media, such as films, psychedelic light shows, and VJ performances. First, some background theory is introduced, explaining the main categories of film sound, and what research tells us regarding the way in which sound influences the perception of visual images and vice versa. Following this background section, a tour is provided through various films that represent altered states of consciousness, including surrealist movies, ‘trance films’, and Hollywood feature films. These demonstrate a progression, where more recent movies are able to make use of digital audio and visual effects to represent the subjective experience of altered states with improved accuracy. Meanwhile, beyond the traditional confines of the cinema, ‘expanded cinema’ works such as visual music, psychedelic light shows, and VJ performances have provided increasingly sophisticated synaesthetic experiences, which are designed to transform the consciousness of their audience.

A qualitative and quantitative account of patient’s experiences of ketamine and its antidepressant properties

2021 ◽  
pp. 026988112199832
Author(s):  
Rachael L Sumner ◽  
Emme Chacko ◽  
Rebecca McMillan ◽  
Meg J Spriggs ◽  
Christie Anderson ◽  
...  
Keyword(s):  
Major Depressive Disorder ◽  
Depressive Disorder ◽  
Rating Scale ◽  
Qualitative Interviews ◽  
Qualitative Interview ◽  
Preliminary Evidence ◽  
Altered States Of Consciousness ◽  
Altered States ◽  
Major Depressive ◽  
States Of Consciousness

Background: Ketamine is central to one of the most rapidly growing areas of neuroscientific research into novel treatments for depression. Limited research has indicated that the psychedelic properties of ketamine may play a role in its antidepressant effects. Aim: The aim of the current study was to explore the psychedelic experiences and sustained impact of ketamine in major depressive disorder. Methods: In the current study, ketamine (0.44 mg/kg) was administered to 32 volunteers with major depressive disorder in a crossover design with the active-placebo remifentanil, in a magnetic resonance imaging (MRI) environment. The 11-dimension altered states of consciousness questionnaire and individual qualitative interviews were used to capture the acute psychedelic experience. The Montgomery-Asberg Depression Rating Scale and further interviewing explored lasting effects. The second qualitative interview took place ⩾3 weeks post-ketamine. Results: Greater antidepressant response (reduction in Montgomery-Asberg Depression Rating Scale at 24 h) correlated with the 11-dimension altered states of consciousness dimensions: spirituality, experience of unity, and insight. The first qualitative interview revealed that all participants experienced perceptual changes. Additional themes emerged including loss of control and emotional and mood changes. The final interview showed evidence of a psychedelic afterglow, and changes to perspective on life, people, and problems, as well as changes to how participants felt about their depression and treatments. Conclusions: The current study provides preliminary evidence for a role of the psychedelic experience and afterglow in ketamine’s antidepressant properties. Reflexive thematic analysis provided a wealth of information on participants’ experience of the study and demonstrated the psychedelic properties of ketamine are not fully captured by commonly used questionnaires.

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