4 ms·

https://en.wikipedia.org/wiki/Troxler%27s_fading https://en.wikipedia.org/wiki/Troxler%27s_fading But my favourite one of these when your vision of something d

by mgdlbp 4y ago

https://en.wikipedia.org/wiki/Troxler%27s_fading https://en.wikipedia.org/wiki/Troxler%27s_fading But my favourite one of these when your vision of something doesn't go away--viewing these test images for a few minutes can alter your visual perception involuntarily for months: https://en.wikipedia.org/wiki/McCollough_effect https://en.wikipedia.org/wiki/McCollough_effect Edit: this might be your study, https://doi.org/10.1016/0042-6989(76)90082-1 https://doi.org/10.1016/0042-6989(76)90082-1 Edit: wtf, I didn't know that waking total paralysis was something that's experimented on in humans. It's impossible to search for too, being camouflaged completely by sleep paralysis. > Before the succinylcholine was administered an arterial tourniquet was placed on the right arm, thus preventing local blood flow and paralysis. This procedure made it possible for JKS to communicate by flexing his hand even during total paralysis. They found lots of other weird effects when trying to move one's eyes that are partially or fully paralysed, like feeling that the entire world is moving in the wrong direction, being able to see during saccades, and afterwards consciously perceiving an object as being in one direction but reaching somewhere entirely different when trying to touch it.

exikyut 4y ago
Wow, thanks for finding that PDF! I would not have had the first clue where to start. In the Fading section on page 5 there's actually a reference to "An Active Feedback System for Stabilizing Visual Images" (1975, DOI 10.1109/TBME.1972.324155), and going and reading *that* is actually making me question my memory of what I originally took note of - I remember a bit about mirrors, I think there might have been a mention of a person's head being secured, and the part with the handles was my own conjecture (I (again) think that the setup described that the mirrors were moved, but I'm not 100% sure). I'm wondering if this was the study that was being referenced?? Thanks! The linked paper and the reference paper are both extremely interesting *adds to collection* And it makes total sense that local anesthetic would be used to achieve paralysis, that's one brute force method lol Troxler's fading is infuriatingly annoying (mumbled in biology's general direction), like the "L R" blind-spot test; while I think need to go stare at the McCollough effect for a bit longer, the test pattern was ever so faintly blue O.o
- mgdlbp 4y ago
  Here's one from 2011- no mirrors in their method, but they cite a range of other relevant studies Visual experiences during paralysis. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3232712 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3232712 (What was that "humor-related task not presented here"? Why even mention it, and in the abstract too? Studying jokes so bad that they had to paralyse their subjects to tell them?)
aasasd 4y ago
Ah, the seventies. > an arterial tourniquet was placed on the right arm, thus preventing local blood flow and paralysis Don't cells begin to die off in seconds after blood flow stops? Did the researchers wire up an infusion to the arm?

by mgdlbp 4y ago

exikyut 4y ago

Wow, thanks for finding that PDF! I would not have had the first clue where to start. In the Fading section on page 5 there's actually a reference to "An Active Feedback System for Stabilizing Visual Images" (1975, DOI 10.1109/TBME.1972.324155), and going and reading *that* is actually making me question my memory of what I originally took note of - I remember a bit about mirrors, I think there might have been a mention of a person's head being secured, and the part with the handles was my own conjecture (I (again) think that the setup described that the mirrors were moved, but I'm not 100% sure). I'm wondering if this was the study that was being referenced?? Thanks! The linked paper and the reference paper are both extremely interesting *adds to collection* And it makes total sense that local anesthetic would be used to achieve paralysis, that's one brute force method lol Troxler's fading is infuriatingly annoying (mumbled in biology's general direction), like the "L R" blind-spot test; while I think need to go stare at the McCollough effect for a bit longer, the test pattern was ever so faintly blue O.o

mgdlbp 4y ago
Here's one from 2011- no mirrors in their method, but they cite a range of other relevant studies Visual experiences during paralysis. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3232712 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3232712 (What was that "humor-related task not presented here"? Why even mention it, and in the abstract too? Studying jokes so bad that they had to paralyse their subjects to tell them?)

aasasd 4y ago

Ah, the seventies. > an arterial tourniquet was placed on the right arm, thus preventing local blood flow and paralysis Don't cells begin to die off in seconds after blood flow stops? Did the researchers wire up an infusion to the arm?