Psychedelic Information Theory
Shamanism in the Age of Reason
Search Results : visual
Showing 40 to 60 of 72
TMS, phosphenes and visual mental imagery: A mini-review and a theoretical framework
We reviewed the existing research linking visual mental imagery and phosphenes induced by TMS. We examined and contrasted conditions (and parameters) under which intensity and amplitude of TMS application at various cortical sites along the ventral a...
Altered States: The Origin of Art in Entoptic Phenomena
... and may be experienced in all senses (aural, visual, tactile, olfactory and synesthetic) not just the visual. Hallucinations may arise out of entoptics as will be outlined shortly. The six entoptic forms which Lewis-Williams and Dowson (1988)...
The Signs of All Times: Entoptic Phenomena in Upper Palaeolithic Art
... and may be experienced in all senses (aural, visual, tactile, olfactory and synesthetic) not just the visual. ...
Thalamocortical afferents in rat transiently express high-affinity serotonin uptake sites
... III, lamina IV, and upper layer V in the primary visual, somatosensory, and auditory cortices. In the primary somatosensory cortex, these binding sites were arrayed in a manner exactly matching the representation of the body surface as demonstrated ...
... performed in the motor, somatosensory and visual cortices in rats. Camera lucida reconstruction of these CT axons revealed that they are all collaterals of long-range corticofugal axons. These collaterals do not give off axonal branches withi...
... In more specific cases we can assume that visual hallucinogenic effect is associated with 5-HT2A and 5-HT2C receptor interaction. Somatic heaviness and dreaminess is associated with broader aminergic interaction; and more sensual, entactogeni...
Does time dilate during a threatening situation?
... of time can also be manipulated experimentally. visual stimuli which appear to be approaching are perceived to be longer in duration than when viewed as static or moving away. Similarly, participants presented with a stream of otherwise identical s...
... Well, of course our main interest is in the visual system, because we think that's the easiest way to approach it. So let me address that. The basic paradigm you want to use is you have a person or an animal, a monkey, looking at something whic...
Effects of LSD on the responses of single units in cat visual cortex
... the activity of single neurones in the primary visual cortex have been studied in cats anaesthetized with urethane. Cells were stimulated with a bright bar of light moved over the receptive field, and orientation tuning was assessed quantitatively...
The Value of Psychedelic Information
... information usually takes the form of visual, audio, and sensory hallucination, but can also be abstract or gestalt in nature. Finally, psychedelic information also applies to any works of art or concepts that originate from or evoke psyc...
... cues from different sensory modalities (e.g., visual, auditory, somatosensory). The functional result of multisensory convergence on an individual cell was determined by comparing the responses evoked from it by a combined-modality (multimodal) s...
... of low-level motion detectors in early visual areas. We have hypothesized that the right inferior parietal lobe (‘when’ pathway) plays a critical role in timing perceptual events relative to one another, and thus we examined the role o...
Pre-semantically defined temporal windows for cognitive processing
... the shift rate of ambiguous stimuli in the visual or auditory modality or the temporal modulation of the mismatch negativity. These different observations indicate the existence of a universal process of temporal integration underlying the men...
The Phase of Ongoing EEG Oscillations Predicts Visual Perception
... level. This finding indicates that the visual detection threshold fluctuates over time along with the phase of ongoing EEG activity. The results support the notion that ongoing oscillations shape our perception, possibly by providing a tem...
The continuous Wagon Wheel Illusion is object-based
... 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 reversed motion rarely occurs for both ob...
EEG coherence in post-LSD visual hallucinations
... use in certain individuals may result in chronic visual hallucinations, a 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 co...
... of subjects with HPPD have shown that when the visual cortex loses coherence with other areas of the brain and coherence among local visual networks increases, spontaneous hallucinations are produced.14 Sensory deprivation for as little as fifteen...
EEG gamma coherence and other correlates of subjective reports during ayahuasca experiences
... field research. EEGs recorded during visual imagery was compared to eyes-closed baselines. The most important findings were increases in global EEG coherence in the 36-44 Hz and 50-64 Hz frequency bands for both subjects. Widely distribu...
Psychedelic Information Theory
... state is generated spontaneously within visual and audio hallucination; ideas which pop into the subject’s imagination; novel juxtapositions of previous concepts; and removed perspectives that allow for new holistic analysis. This i...
Chaotic fingerprints and space-time labyrinths
... the camera at a monitor or TV to create a visual feedback loop. Complex animated patterns are made of light which is trapped in a loop. There doesn’t seem to be any obvious practical application for video feedback but the forms generate...
« Back 20 | Next 20 » Showing 40 to 60 of 72