Psychedelic Information Theory
Shamanism in the Age of Reason
Search Results : brain
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... stabilize sensory cohesion across the entire brain. By applying disinhibition to audio networks, a subject under the influence of psychedelics may hear an echo or murmur rising in the wake of each sound. By applying disinhibition to tactile netw...
Neural axons in the human brain are always branching and creating new synaptic connections to facilitate learning and development. Like the toning and bulking of muscle mass, neural connectivity, developmental growth, and plasticity are based partly ...
An Overview of Physical Shamanism
... driver.1 Physical shamanism assumes the human brain in a destabilized state acts as a resonant oscillator, or a nonlinear information processing system; thus the application of periodic resonant drivers will drive complex phase transitions into m...
... as opposed to emerging within the cortex or midbrain. There is evidence that entoptic phosphene patterns have influenced human cultural and religious archetypes since 10,000 BCE.1,2,17 [fig]2;1[/fig]Entoptic hallucinations fall into predictable ...
... and marihuana which also stimulates the brain to produce more alpha waves. We suggest that these findings of increased EEG alpha and theta activity after drinking ayahuasca reflect an altered state of consciousness. In this state the subjec...
... and dose-dependent changes in spontaneous brain electrical activity, which parallel the time course of subjective effects. In the present study, the spatial distribution of ayahuasca-induced changes in brain electrical activity was investigat...
... method measuring drug-induced variations in brain electrical activity. Methods Two doses (one low and one high) of encapsulated freeze-dried ayahuasca, equivalent to 0.6 and 0.85 mg DMT kg−1 body weight, were administered to 18 health...
TMS, phosphenes and visual mental imagery: A mini-review and a theoretical framework
... of visual processing and in other parts of the brain....
Altered States: The Origin of Art in Entoptic Phenomena
... rhythmic movement, schizophrenia, brain damage, intense emotion, stress, food and water deprivation, withdrawal from alcohol, advanced syphilis, crystal gazing, fever, etc. (Lewis-Williams and Dowson, 1988; Asaad and Shapiro, 1986; Si...
Presynaptic uptake blockade hypothesis for LSD action at the lateral inhibitory synapse in Limulus
... for many aspects of LSD's action in mammalian brain....
Thalamocortical afferents in rat transiently express high-affinity serotonin uptake sites
Autoradiographic techniques using [3H]citalopram were employed in 8-day-old (P-8) and adult rats to delineate the distribution of high-affinity serotonin (5-HT) uptake sites in the cerebral cortex. In the postnatal rats, [3H]citalopram binding sites ...
... long-range corticofugal projections reaching the brainstem and spinal cord arise exclusively from layer V neurons. These observations raise the possibility that the CT input from layer V cells may be collaterals of those long-range axons projecting ...
Distribution of 5HT2A receptors in the human brain: comparison of data in vivo and post mortem
... distribution of 5HT2A receptors in human brains. The in vivo method seems to be sensitive enough to detect changes in receptor density of more than 18%....
... in consecutive tissue sections from the rat brain by in situ hybridization histochemistry. No evidence for the expression of 5-HT2B receptor was found. High levels of 5-HT2A (formerly 5-HT2) receptor mRNA were observed only in few areas, as the...
The distribution of 5-HT1A and 5-HT2A receptor mRNA in human brain
... histochemistry. Receptor transcripts in brains from two males and two females (mean age +/- S.D. = 70 +/- 4 years; post-mortem interval = 29 +/- 6 h) were visualised with 35S-radiolabelled synthetic oligodeoxyribonucleic acid probes. In the...
Sensory gating deficits in schizophrenia: new results
... to be most prominent in the frontal areas of the brain. CONCLUSIONS: These data reflect a regionally diffuse loss of normal sensory gating in schizophrenic patients. ...
DOI disrupts prepulse inhibition of startle in rats via 5-HT2A receptors in the ventral pallidum.
... neural circuitry that mediates the ventral forebrain modulation of PPI. In the present studies, it was found that the infusion of DOI (0.0-5.0 microg/0.5 microl) into the VP disrupted PPI without having effects on startle reactivity. In contrast, ...
An Interview with Dave Nichols
... the idea that when these things bind to their brain receptors, if we could lock them into the same shape that the receptor had, their potency would increase, and that would give us some idea of what the shape was, much in the way — to use a sim...
... that modulate signal flow in the brain. If we take a close look at the structure of common neurotransmitters (Fig. 1) the transmitters most closely related to the classic psychedelics are serotonin (5-HT), adrenaline (epinephrine), n...
... on the postsynaptic neuron. The human brain has a huge number of synapses. Each of the 1011 (one hundred billion) neurons has on average 7,000 synaptic connections to other neurons. It has been estimated that the brain of a three-year-old...
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