Psychedelic Information Theory
Shamanism in the Age of Reason
Search Results : perception
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Pre-semantically defined temporal windows for cognitive processing
... are hypothesized to be basic for temporal perception; this theoretical concept provides the frame to discuss two temporal mechanisms that are thought to be essential for cognitive processing. One such mechanism operates with periods of oscill...
The Phase of Ongoing EEG Oscillations Predicts Visual Perception
... is known to correlate with various aspects of perception, the influence of oscillatory phase on perception remains unknown. In particular, since phase varies on a much faster timescale than the more sluggish amplitude fluctuations, phase effects ...
The continuous Wagon Wheel Illusion is object-based
... taken as evidence that some aspects of motion perception rely on discrete sampling of visual information. The spatial extent of this sampling is currently under debate. When two separate motion stimuli are viewed simultaneously, the illusion of r...
EEG coherence in post-LSD visual hallucinations
... DSM-IV syndrome known as hallucinogen persisting perception disorder (HPPD). We studied 38 HPPD subjects with a mean of 9.7 years of persistent visual hallucinations and 33 control subjects. Measures of local and medium distance EEG spectral coheren...
... functions for any conscious system are: 1) perception; 2) recognition; 3) memory; 4) recall; and 5) behavior. The minimum specific operating properties for any conscious system are: 1) modular coherence; 2) linear stability; 3) feedback contro...
Gamma coherence and conscious perception
... involved directly in the mechanisms of conscious perception or just in processes prior to conscious awareness. Objective: To investigate the relation of gamma coherence and perception. Methods: Digital intracranial electrocorticographic record...
Notes on the Term 'Psychedelic'
... describe pharmacological effect on sensation and perception. All other terms, including entheogen, hallucinogen, psychotomimetic, and so on, are essentially lacking in that they tend to highlight only a single aspect of the entire experience. Psyche...
What is Psychedelic Information Theory?
... seeks to model the functional output of human perception in order to extrapolate the limits and complexity of information arising in human altered states of consciousness. The foundation of PIT lies in novelty theory, the study of increasing com...
Bypassing interneurons: inhibition in neocortex
A recent paper suggests a new form of inhibitory circuit in cortex, in which a pyramidal cell directly excites the presynaptic terminal of an inhibitory interneuron, allowing the rapid and powerful inhibition of another pyramidal cell....
Scientists explain inception of perception in the brain
... pop fly into left field – indeed all of human perception – begins in the brain’s center. That’s where sensory information passes from the thalamus to the neocortex for processing. That critical transfer is a bit of a brain scienc...
Local cortical lesions abolish lateral inhibition at direction selective cells in cat visual cortex
Many cells in the cat visual cortex display a strong selectivity for the direction of motion of an optimally oriented stimulus. Postsynaptic inhibition has been suggested to generate this direction selectivity in simple cells, but the intracortical p...
Pinna illusion is the first visual illusion showing a rotating motion effect. In Figure 1 the squares, delineated by two white and two black edges each, are grouped by proximity in two concentric rings. All the squares have the same width, length, an...
... sense, by altering the subject’s paradigm and perception of reality. Both of these transformations imply targeted neuroplasticity. The extreme diets and psychedelic medicine catalyze spontaneous stress-based reorganization of neural identity stru...
Cortical Region Interactions and the Functional Role of Apical Dendrites
The basal and distal apical dendrites ofpyramidal cells occupy distinct cortical layers and are targeted by axons originating in different cortical regions. Hence, apical and basal dendrites receive information from distinct sources. Physiological ev...
Timewarp: How your brain creates the fourth dimension
... times. What's more, since time is crucial to our perception of causality, a faulty internal clock might also explain the delusions suffered by people with schizophrenia. But first, the basics. Perhaps the most fundamental question neuroscientists...
The basic structure of the eye is shown in Figure 1. The anterior portion of the eye is essentially a lens system, made up of the cornea and crystalline lens, whose primary purpose is to focus light onto the retina. The retina contains receptor cells...
A model of the perception limits of the human visual system is presented, resulting in an estimate of approximately 15 million variable resolution pixels per eye. Assuming a 60 Hz stereo display with a depth complexity of 6, we make the prediction th...
Effects of psilocybin on time perception and temporal control of behaviour in humans
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Information Processing in Human Body
We can think about the human body as a self-organized collective of clones of a single fertilized egg cell. Each cell of the human body is an elaborate bio-chemical computer. It has its own power management and information processing structures. It c...
Increasing evidence suggests a link between attention, working memory, serotonin (5-HT) and prefrontal cortex activity. In an attempt to tease out the relationship between these elements, this study tested the effects of the hallucinogenic 5-HT1A/2A ...
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