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fagmin
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Hollow mask e a esquizofrenia
03-06-13, 08:53
#1
[flame on]Uma semelhanca entre esquizofrenicos, bebados e maconheiros[flame off]
Mas falando serio, se realmente nao for bug do olho e sim uma compensacao que o cerebro faz, realmente é impressionante, imagino se existem outras coisas que "compensamos" e nao enxergamos simplesmente por um tipo de sobrecarga de exemplos contrarios. No comeco do video vc ve a mascara oca, mas basta girar um pouco mais e tcharam, ja da o efeito contrario e a mascara de concava fica convexa. http://www.wired.com/wiredscience/20...chizoillusion/ Schizophrenia sufferers aren’t fooled by an optical illusion known as the “hollow mask” that the rest of us fall for because connections between the sensory and conceptual areas of their brains might be on the fritz. In the hollow mask illusion, viewers perceive a concave face (like the back side of a hollow mask) as a normal convex face. The illusion exploits our brain’s strategy for making sense of the visual world: uniting what it actually sees — known as bottom-up processing — with what it expects to see based on prior experience — known as top-down processing. "Our top-down processing holds memories, like stock models," explains Danai Dima of Hannover Medical University, in Germany, co-author of a study in NeuroImage. "All the models in our head have a face coming out, so whenever we see a face, of course if has to come out." This powerful expectation overrides visual cues, like shadows and depth information, that indicate anything to the contrary. But patients with schizophrenia are undeterred by implausibility: They see the hollow face for what it is. About seven out of 1000 Americans suffer from the disease, which is characterized by hallucinations, delusions, and poor planning. Some psychologists believe this dissociation from reality may result from an imbalance between bottom-up and top-down processing — a hypothesis ripe for testing using the hollow mask illusion. In healthy viewers, the illusion is so powerful that even when aware of the illusion (see video below), they are unable to see the concave face — the mind just flips it back. Though the illusion is strong for faces, it doesn’t work well with other objects, or even with upside-down faces. This bias is likely due to the special relationship we humans have with faces. Many neuroscientists believe we have brain regions dedicated to processing faces, and some brain injuries can leave patients unable to recognize faces, even though their vision and other memories remain intact. Dima and Jonathan Roiser of University College London wanted to understand why people with schizophrenia aren’t fooled. They put 13 schizophrenia patients and 16 healthy control subjects in an fMRI scanner that measures brain activity, and showed them 3D images of concave or convex faces. As expected, all of the schizophrenic patients reported seeing the concave faces, while none of the control subjects did. Dima and Roiser analyzed the fMRI data using a relatively new technique called dynamic causal modeling, which allowed them to measure how different brain regions were interacting during the task. When healthy subjects looked at the concave faces, connections strengthened between the frontoparietal network, which is involved in top-down processing, and the visual areas of the brain that receive information from the eyes. In patients with schizophrenia, no such strengthening occurred. Dima thinks when healthy subjects see the illusion, which is somewhat ambiguous, their brains strengthen this connection such that what they expect — a normal face — becomes more influential, overpowering the actual, though unlikely, visual information. Schizophrenia patients, meanwhile, may be unable to modulate this pathway, accepting the concave face as reality. Schizophrenics aren’t the only ones who see the concave face — people who are drunk or high can also ‘beat’ the illusion. A similar disconnect between what the brain sees and what it expects to see may be occurring during these drug-induced states. Citation: "Understanding why patients with schizophrenia do not perceive the hollow-mask illusion using dynamic causal modelling" by Danai Dima, Jonathan P. Roiser, Detlef E. Dietrich, Catharina Bonnemann, Heinrich Lanfermann, Hinderk M. Emrich, Wolfgang Dillo, NeuroImage, In Press, Available online 24 March 2009. |
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Trooper
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03-06-13, 08:57
#2
eu fiquei tipo "ué, a mascara ta normal..."
ai no final, na ultima girada, baaang eita que susto aeiuaheiua |
fagmin
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03-06-13, 09:15
#3
foi de proposito
no link da materia aparece uma mascara ilustrando, normal, olhei e so pensei "xi....." |
Chief Rocka
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03-06-13, 09:48
#4
fuck yeah, fui enganado na primeira girada, brain OK.
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Trooper
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03-06-13, 09:53
#5
o mais foda é que mesmo já sabendo o que irei ver, meu cérebro continua interpretando de maneira errada a informação!
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Trooper
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03-06-13, 10:16
#6
li isso aqui:
Quote:
mais: será que esquizofrenia o cerebro se comporta igual quando ta loucasso? aiuehaiu |
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Trooper
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03-06-13, 10:29
#7
Significa que quando vc tá loucasso seu cérebro não é mais iludido e vc vê as coisas como elas realmente são?
#luizinha |
Trooper
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03-06-13, 10:43
#8
Alguém notou uma pessoa de pé ali no canto ?
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Trooper
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03-06-13, 10:50
#9
é um quadro, marcelo
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Mandalorian
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03-06-13, 11:02
#10
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Trooper
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03-06-13, 11:14
#11
so o que importa é que quando voce derrete seu cerebro voce ve 2 caras na mesma mascara
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Trooper
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03-06-13, 11:38
#12
Quote:
já ouvi histórias de que nego corre grande risco de não voltar da viagem! Quote:
Last edited by vegetous; 03-06-13 at 11:52.. |
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Trooper
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03-06-13, 11:51
#13
Só na última girada que foi o momento 'oh shit' e entendi oq o cara tava falando aheauheuh
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Trooper
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03-06-13, 11:54
#14
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Trooper
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03-06-13, 12:18
#15
eu n vi normal em nenhuma das giradas... isso eh bom ou ruim? ehaueh
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Trooper
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03-06-13, 12:25
#16
Cara, eu vi normal na primeira girada e depois "errado".
Depois de ler a matéria não consegui mais ver normal, nem querendo hehe. |
Carry
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03-06-13, 12:26
#17
Só vendo os comentários aqui e vendo o vídeo pela segunda vez que eu consegui ver o tal efeito HAOEIUHAE.
Detalhe que a máscara parece rodar pro outro lado qdo vc vê ela no modo côncavo, tipo aquela figura da mulher que vc consegue ver girando pros 2 lados: [SPOILER] Tem tbm aquele dragãozinho de papercraft , acredito ser o mesmo tipo de "bug cerebral" Pra quem quiser fazer um, ta aqui: [SPOILER] Em especial pro Jeep: [SPOILER] |
Trooper
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03-06-13, 13:00
#18
Genial.
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Trooper
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03-06-13, 13:08
#19
no aguardo da discussao entre conrado e evilbrain
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Trooper
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03-06-13, 13:44
#20
Eon, é de Deus isso ai?
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Trooper
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03-06-13, 17:14
#21
Eu vi como concavo e como convexo, to muito fodido ?
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Trooper
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03-06-13, 17:23
#22
Isso não prova nada, só prova q o rosto de Chaplin era sinistro por dentro .
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Trooper
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03-06-13, 17:24
#23
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The real (1)
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03-06-13, 18:03
#24
Não tenho esquiso
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Trooper
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03-06-13, 18:14
#25
Não entendi o vídeo e não tive saco pra ler tudo
Só fica a máscara girando, q q tem? |
Mandalorian
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03-06-13, 18:34
#26
Não tenho saco pra te explicar.
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Trooper
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03-06-13, 18:41
#27
Grosso
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Trooper
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03-06-13, 20:36
#28
Aonde ?
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Banned
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04-06-13, 09:12
#30
alguem explica ai porra
se nao ver o rosto girando pro outro lado eh loko? eu nao vi nada |
Trooper
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04-06-13, 09:22
#31
roadão, veja uma vez o vídeo careta ae, depois fume uma bomba e veja de novo pra ver se dá alguma diferença
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Banned
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04-06-13, 09:45
#32
nao existe a opcao roadao careta
tem q me dar na hora q to acordando |
Trooper
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04-06-13, 10:27
#33
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Trooper
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04-06-13, 10:46
#34
Fiz o dragao aqui. kkk Depois que vi que tinha que fechar um olho. Tava quase jogando fora.
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Trooper
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04-06-13, 15:58
#35
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Trooper
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05-06-13, 15:38
#36
Pensei que esse tópico tinha algo a ver com bleach...
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