Beyond blindsight.

· Humans are able to capture an expression in 12 milliseconds.

Helen Briggs BBC, Ciencia                                                          27/12/ 2008    


Our brain digests much more information than what we perceive. So it is with visual stimuli: The information enters our eyes the conscious brain areas processing, while other regions of our unconscious. Beatrice de Gelder spent years researching in this area from Harvard, in the U.S., and Tilburg, the Netherlands. Which shows that the sense of sight is closer to intuition and emotions.

A team of scientists discovers that a man after going blind, suffering a stroke, is able to overcome obstacles, thanks to brain hidden connections. This study also demonstrates that use subconscious mental resources and that we are able to do things that we think we can not do. The patient, identified as TN, has a corneal alteration in both hemispheres of the brain after suffering consecutive spills. His eyes are fully trained to see, but your brain can not process the information sent, leaving him completely blind, this is called “blindsight”, the ability to perceive objects and occurrences without being aware that you are viewing. However, when he does walk with a cane to avoid obstacles, and requires guidance from others. Scientists have made an experiment by an obstacle course and TN overcame all without any help.

When he started investigated “blindsight” was not really taken seriously by scientists began to take seriously from the 70s when they began experimenting with monkeys. Scientists experimented with TN to put helmets so he could not hear anything, but nevertheless was also able to dodge objects, it was not so, when the scientists put on to TN the dark glasses, began to collide with objects, which means that eye must be perfect for that visual information can reach the eyes. A part of the main route, the visual cortex, there are other different visual pathways, which Beatrice de Gelder began to study, also found with other patients, although they are not able to see anything, they responded with emotion and gestures or body expressions . She is also investigating with people who have no vision problem, we can see an expression of anger in 12 milliseconds, yet we are not aware that we saw the expression. This is closely linked to intuition but our culture does not trust the intuition need solid evidence.

Personal comment:

In conclusion, it seems that our brain is ready to process more information quickly, but we are not aware of that. This is closely linked with the unconscious and intuition. The visual system also goes beyond the image itself. I chose this topic because I find it very interesting how the brain works, the part of the unconscious, and the details that go by our eyes in less than a second, and we are not able to assimilate of that, but our unconscious yes.

Esta entrada foi publicada en Curso 2012-2013, Saúde. Ligazón permanente.

4 Responses to Beyond blindsight.

  1. O tema é realmente interesante. De feito decidín abrir unha nova categoría (Neurociencia / Psicoloxía)
    Está moi ben acceder a información de audiovisuais de divulgación científica, como Redes, pero non cumples os requisitos que puntúan o teu post:

    – Falta o comentario persoal
    – Falta a busca da fonte orixinal (neste caso é moi facil porque sabes o nome da revista e da autora). Atópalo inmediatamente cun buscador. Ben certo é que o resultado é moito máis arido que a entrevista coa autora, pero está ben saber que hai unha publicación científica detrás.

    Completa para subir a nota.

  2. O tema da visión cega paréceme certamente interesante. O feito de que o cerebro reacciona diante de estímulos dunha forma para nós incosciente é algo que coñecía, pero nunca o oira aplicado a algo tan importante como graves enfermedades que afectan á visión.

  3. tcptalia di:

    Xa o editei, non atopei o artigo orixinal, pero rescribino ao inglés para subir nota

    • Estás totalmente fóra de prazo… as notas xa están postas. Ademais é imposible non atopar o artigo coa información que tes. Tal como suxería no comentario anterior: “neste caso é moi facil porque sabes o nome da revista e da autora”. É dicir, só tiñas que ir a ‘Current Biology‘ e no propio buscador da revista poñer “Beatrice de Gelder“. Tampouco era tan difícil.

Deixar unha resposta

Please log in using one of these methods to post your comment:

Logotipo de

Estás a comentar desde a túa conta de Sair /  Cambiar )

Google+ photo

Estás a comentar desde a túa conta de Google+. Sair /  Cambiar )

Twitter picture

Estás a comentar desde a túa conta de Twitter. Sair /  Cambiar )

Facebook photo

Estás a comentar desde a túa conta de Facebook. Sair /  Cambiar )


Conectando a %s