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Kirtaner & Spardot's 420chan Wedding

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Rotating mask illusion by Ebenezer Senkinton - Sat, 09 Jun 2018 00:11:08 EST ID:uz0Nv0EE No.889333 Ignore Report Quick Reply
File: 1528517468987.jpg -(92088B / 89.93KB, 600x849) Thumbnail displayed, click image for full size. 92088

So the mask turns clockwise, or seems to until the illusion kicks in. Then when we see the back of the mask, it suddenly changes to convex and appears to be rotating the other way, switching back when we see the front of the mask again.

The idea seems to be that psys cancel the illusion by turning off the default mode network, letting the tripper see what's actually there. I was skeptical till I tried it while tripping last night. The illusion was there when I took acid. An hour later the acid had kicked in and there was no illusion.

Is this actually a test of whether the default mode network is on or off?

Quote from michael pollan's book, how to change your mind:

>...(David Nutt puts the matter bluntly, claiming that in the DMN “we’ve
found the neural correlate for repression.”) Carhart-Harris hypothesizes
that these and other centers of mental activity are “let off the leash” when
the default mode leaves the stage, and in fact brain scans show an
increase in activity (as reflected by increases in blood flow and oxygen
consumption) in several other brain regions, including the limbic regions,
under the influence of psychedelics. This disinhibition might explain why
material that is unavailable to us during normal waking consciousness
now floats to the surface of our awareness, including emotions and
memories and, sometimes, long-buried childhood traumas. It is for this
reason that some scientists and psychotherapists believe psychedelics can
be profitably used to surface and explore the contents of the unconscious

>But the default mode network doesn’t only exert top-down control
over material arising from within; it also helps regulate what is let into
consciousness from the world outside. It operates as a kind of filter (or
“reducing valve”) charged with admitting only that “measly trickle” of
information required for us to get through the day. If not for the brain’s
filtering mechanisms, the torrent of information the senses make
available to our brains at any given moment might prove difficult to
process—as indeed is sometimes the case during the psychedelic
experience. “The question,” as David Nutt puts it, “is why the brain is
ordinarily so constrained rather than so open?” The answer may be as
simple as “efficiency.” Today most neuroscientists work under a
paradigm of the brain as a prediction-making machine. To form a
perception of something out in the world, the brain takes in as little
sensory information as it needs to make an educated guess. We are
forever cutting to the chase, basically, and leaping to conclusions, relying
on prior experience to inform current perception.

>The mask experiment I attempted to perform during my psilocybin
journey is a powerful demonstration of this phenomenon. At least when it
is working normally, the brain, presented with a few visual clues
suggesting it is looking at a face, insists on seeing the face as a convex
structure even when it is not, because that’s the way faces usually are.
Lillian Lightson - Mon, 11 Jun 2018 04:29:45 EST ID:USfjcRrz No.889389 Ignore Report Quick Reply
interesting theory
i've been working on a similar hypothesis
but am a bit tired rn
Shitting Moshtuck - Mon, 11 Jun 2018 12:40:47 EST ID:Y+PLtVqy No.889400 Ignore Report Quick Reply
fun read, super interesting.

Apparently people with schizophrenia also have trouble perceiving the illusion

I don't know much about schizophrenia, but it would appear to have a significant effect on the default mode network as well, cool!

any further reading i should look at?
Lydia Niblingbock - Mon, 11 Jun 2018 20:30:19 EST ID:USfjcRrz No.889414 Ignore Report Quick Reply
Reuben Gellerville - Thu, 14 Jun 2018 07:18:29 EST ID:FpPL38Op No.889469 Ignore Report Quick Reply
apparently healthy people that are drunk or high from cannabis don't perceive the illusion/can discern which side of the mask they are seeing accurately as well, it's not really specific to being on psychedelics. it seems to be more related to whether a subject is currently in a healthy, sober waking state of consciousness or an altered states of consciousness in general.
Jack Tillingstone - Fri, 15 Jun 2018 06:04:05 EST ID:Wi3inel0 No.889499 Ignore Report Quick Reply
well i'm high and yeah can't see it lol, usually i do
Nicholas Fubblestone - Fri, 15 Jun 2018 07:34:38 EST ID:PIDlkKo3 No.889502 Ignore Report Quick Reply
i actually don't get fooled by the illusion myself while sober, but I'm not sure if that's because I work so much with 3d modeling/sculpting objects or even possibly because I've had two concussions that may have somehow fucked up normal cognitive processing because alterations of regular brain structure and functioning.

If I had to guess which is more likely, it's the latter.

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