Psychedelic Information Theory
Shamanism in the Age of Reason
Search Results : fish-eye
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The following is an interview-style discussion of topics presented in Psychedelic Information Theory with the author, provided as a summary and general overview of theory for the non-scientific layperson. What is Psychedelic Information Theory? The...
5-HT2A Agonism and Multisensory Binding
Most visual hallucinogens are active as full or partial agonists at the 5-HT2A receptor subtype, and all produce similar visual hallucinations that are immediately recognizable as psychedelic.1 Although the 5-HT2A receptor subtype is not the only rec...
Psychic bonding is a physical, neurological adaptation that occurs when two subjects spend time together sharing thoughts, feelings, and personal space. Psychic bonding is a survival trait that all animals and possibly all plants share. Psychic bonds...
* Delta is the frequency range up to 4 Hz. It tends to be the highest in amplitude and the slowest waves. It is seen normally in adults in slow wave sleep. It is also seen normally in babies. It may occur focally with subcortical lesions and in g...
Notes on Closed Eye Hallucinations
Accounts of saturated green and violet colors seen in closed-eye tryptamine hallucinations are taken from subjective reports....
The visible spectrum is the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respon...
Any discussion of psychedelic hallucination is a discussion of the spontaneous emergence of perceptual information within human consciousness. Human perception is limited by the capacity of sense organs (Fig. 1); the speed and architecture of the neu...
A Motion Illusion Reveals Mechanisms of Perceptual Stabilization
Visual illusions are valuable tools for the scientific examination of the mechanisms underlying perception. In the peripheral drift illusion special drift patterns appear to move although they are static. During fixation small involuntary eye movemen...
Uncoiling the spiral: Maths and hallucinations
Think drug-induced hallucinations, and the whirly, spirally, tunnel-vision-like patterns of psychedelic imagery immediately spring to mind. But it's not just hallucinogenic drugs like LSD, cannabis or mescaline that conjure up these geometric structu...
Vivid dreams, hallucinations, psychosis and REM sleep in Guillain-Barré syndrome
We conducted a prospective controlled study of the clinical and biological determinants of the mental status abnormalities in 139 patients with Guillain-Barré syndrome (GBS) and 55 patients without GBS placed in the intensive care unit (ICU controls...
Notes on Progressive Hallucination
Accounts of eidetic hallucinations arising progressively and being wiped from visual memory by eye movements taken from subjective reports....
Sleep and General Anesthesia as Altered States of Consciousness
Stages of Sleep EEG recordings show that we go through five stages of sleep each with its characteristic brain-wave activity. Stage 1 is the transition stage from wakefulness to sleep and is identified with theta waves and last between 1 to 7 minu...
Altered Conscious States Three main types of altered states of consciousness can be defined: physiologically, pharmacologically, and pathologically altered conscious states. Normal sleep, encompassing light (stage II) and deep (stage III and IV...
The stuff dreams are made of: anatomical substrates of REM sleep
Where do dreams come from? Why do we dream? A recent paper1 brings us closer to answering the first question, although the answer to the second question remains elusive. Rapid eye movement (REM) sleep was discovered in 1953. Its hallmarks are pe...
... of perceptual space may begin to elongate like a fish-eye lens (Fig. 5). If a fading frame produces an emotionally salient pattern, the salient frame can then feed back into the arising frame as a progressively animated eidetic loop. When sixteen fr...
Entoptic hallucination, geometric hallucinations, or phosphenes, are one of the most commonly reported visual effects of psychedelics. Phosphenes are a sensation of light caused by excitation of the retina by mechanical or electrical means. Pressure ...
1. To explore the feasibility of a visual prosthesis for the blind, human visual cortex has been stimulated during a series of surgical procedures on conscious volunteers undergoing other occipital lobe surgery. 2. Area no. 17 seems the most effec...
Altered States: The Origin of Art in Entoptic Phenomena
J.D. Lewis-Williams and T.A. Dowson (1988) in their article 'The Signs of All Times' propose a neurobridge backwards in time to the Upper Palaeolithic by which we can gain insight into the nature of the origins of art. Our nervous system has not chan...
The Signs of All Times: Entoptic Phenomena in Upper Palaeolithic Art
J.D. Lewis-Williams and T.A. Dowson (1988) in their article 'The Signs of All Times' propose a neurobridge backwards in time to the Upper Palaeolithic by which we can gain insight into the nature of the origins of art. Our nervous system has not chan...
Presynaptic uptake blockade hypothesis for LSD action at the lateral inhibitory synapse in Limulus
We investigated the action of LSD at the putative indoleaminergic lateral inhibitory synapse in the lateral eye of Limulus polyphemus. We recorded extracellular and intracellular voltage responses from eccentric cells while producing inhibition eithe...
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