8A Geometry - Perceived exposure to semantic concept network

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A visualisation of the brain's semantic concept hierarchy based upon data collected through fMRI scans.[1][2]

8A geometry is one of the two potential final levels of visual geometry; the other is 8B geometry.

A level 8A experience can be described as the feeling of being exposed to a seemingly infinite mass of geometry comprised entirely of innately comprehensible representations which are perceived to simultaneously convey every internally stored concept, memory, and neurological structure stored within the subconscious mind simultaneously. This experience is not just perceived through visual geometric data but is also physically felt in an incomprehensible level of detail that manifests at every point across itself as complex cognitive and tactile sensations. These sensations convey an equal amount of innately understandable information as that which is also experienced through one's sense of vision.

At the lower side of level 8A, this effect is something that fluctuates wildly and is neither constant nor consistent in its intensity. Instead, it is momentarily triggered by the experience of a concept. For example, if somebody were to say the word “Internet” to a person who is currently undergoing this state, they would see the mind's concept of the "Internet" immediately manifested in a geometric form amidst the very center of their visual field. This form will then quickly branch out from itself in a manner which is similar to an ineffable spider diagram. This further expands to envelop the concepts which one associates with the original concept before branching out again to include the concepts one associates with those before repeating this process of branching out further ad infinitum. Within roughly 2 - 3 seconds, this exponentially expands within a sudden perceptual flash to include every single internally stored concept within the subconscious memory banks of one's mind simultaneously.

Once this occurs, the sensory overload can temporarily disconnect one from their external environment and result in simultaneous long-term memory suppression or "ego death" before re-stacking the person back into reality until something triggers the process again (usually immediately). The effect typically snaps one in and out of reality repeatedly as the process is triggered continuously by external stimuli.

It's worth noting, however, that at this level it can, to a certain extent, be disabled through continuous physical movement. This is because movement seemingly stops the process from branching out into everything by not giving the effect the time it needs to lock onto a concept.

As the dose of the psychoactive substance is increased, the process becomes easier to trigger whilst extending in its length and duration. This eventually results in a stable state of complete disconnection from the external environment alongside of sustained "ego death" and a lasting sense of subjectively experiencing all of existence, everything there is, and the entire universe, in a single instant.

The experience of this effect is most common under the influence of very heavy dosages serotongergic psychedelics. However, there are particular attributes of certain psychedelics which tend to result a higher likelihood of level 8B over level 8A and vice versa. Psychedelics which are stimulating in physical effects and contain low amounts of hallucinatory content usually result in level 8A. For example, psychedelics which contain these attributes include LSD, 2C-B and 4-HO-MET. In contrast, psychedelics which lead to level 8B are typically sedating in physical effects and contain high amounts of hallucinatory content. For example, psychedelics which contain these attributes include psilocin, DMT and 2C-C.

Psychoactive substances

Compounds within our psychoactive substance index which may cause this effect include:

Experience reports

Anecdotal reports which describe this effect within our experience index include:

See also


  1. http://www.united-academics.org/magazine/mind-brain/first-interactive-categorized-map-of-the-brain/
  2. http://gallantlab.org/semanticmovies/