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Psychedelic Information Theory

Shamanism in the Age of Reason

Search Results : oscillations

Showing 1 to 12 of 12

Hallucinations: synchronisation of thalamocortical gamma oscillations underconstrained by sensory input

... transiently forming assemblies of coherent gamma oscillations under constraints of sensory input and prefrontal attentional mechanisms. Perception and conscious experience may be based on such assemblies and sensory input to thalamic nuclei plays me...

Thalamic circuitry and thalamocortical synchrony

... of the cortex to synchronize low-frequency oscillations in the network. Interactions of focused corticothalamic axons arising from layer VI cortical cells and diffuse corticothalamic axons arising from layer V cortical cells, with the specific...

Hypnotic Entrainment and Induced Trance States

... back and forth between them are referred to as oscillations, and these oscillations take on the predictable mathematical properties of waves; a wave being any standing oscillation passing through a medium. These standing oscillations – literal w...

Impairments in frontal cortical gamma synchrony and cognitive control in schizophrenia

... yet well characterized. Synchronous gamma-band oscillations have been associated with a wide range of perceptual and cognitive processes, raising the possibility that they may also help entrain prefrontal cortical circuits in the service of cognit...

Erratic Hallucination

... and decreased ability to produce the fast gamma oscillations needed to focus sensory perception.8,10 Multisensory destabilization is also reproduced by the hallucinogenic dissociatives ketamine and dextromethorphan (DXM) by blocking associative NMD...

Entrainment (Physics)

... from periodic environmental cues. Circadian oscillations occur even in isolated organs, and it is believed that a master pacemaker in the mammalian brain, the SCN (suprachiasmatic nuclei), entrains the periphery. Such hierarchical relationships...

Pre-semantically defined temporal windows for cognitive processing

Neuronal oscillations of different frequencies 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 me...

The Phase of Ongoing EEG Oscillations Predicts Visual Perception

oscillations are ubiquitous in electrical recordings of brain activity. While the amplitude of ongoing oscillatory activity is known to correlate with various aspects of perception, the influence of oscillatory phase on perception remains unknown. In...

What is Consciousness?

... neural spike synchrony, and coherence of network oscillations.7 Waking consciousness oscillates within the alpha and beta ranges; high frequency gamma coherence is associated with the fast binding of cortical networks necessary for perception and co...

How the Brain Filters out Distracting Thoughts to Focus on a Single Bit of Information

The human brain is bombarded with all kinds of information, from the memory of last night's delicious dinner to the instructions from your boss at your morning meeting. But how do you "tune in" to just one thought or idea and ignore all the rest of w...

Frequency of gamma oscillations routes flow of information in the hippocampus

Gamma oscillations are thought to transiently link distributed cell assemblies that are processing related information1, 2, a function that is probably important for network processes such as perception1, 2, 3, attentional selection4 and memory5, 6. ...

Timewarp: How your brain creates the fourth dimension

... this may be the answer. "When you have faster oscillations, you have more snapshots per second," says VanRullen. "You may be more efficient at particular cognitive tasks, and because there are more snapshots in a given time, it may seem to last f...

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