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Barry mahfood

THE PRICE OF RICE - Transcendence in Bite-Sized Bits: Peering into the Human Brain: Nan... - 0 views

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    It is believed that supercomputers will achieve the computational power of human brains by about 2020, personal computers just a few years later, so figuring out the details of the brain's structure and functioning needs to keep pace. A major challenge in this has been the limits of MRI resolution, which is why the news of a major breakthrough has such significance.
thinkahol *

Short Sharp Science: Half a heartbeat changes our response to scary images - 0 views

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    In another study, in which volunteers saw the same pictures while having their brain scanned using MRI, she found that people had a stronger response in the hippocampus and amygdala - areas of the brain associated with fear - when they were shown fearful faces at systole than when they saw them at diastole. In other words, half a heartbeat was all it took for a person to experience a significantly different response to the same scary stimulus.
thinkahol *

How your memories can be twisted under social pressure | KurzweilAI - 1 views

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    Listen up, Facebook and Twitter groupies: how easily can social pressure affect your memory? Very easily, researchers at the Weizmann Institute and University College London have proved, and they think they even know what part of the brain is responsible. The participants conformed to the group on these "planted" responses, giving incorrect answers nearly 70% of the time. Volunteers watched a documentary film in small groups. Three days later, they returned to the lab individually to take a memory test, answering questions about the film. They were also asked how confident they were in their answers. They were later invited back to the lab to retake the test. This time, the subjects were also given supposed answers of the others in their film-viewing group (along with social-media-style photos) while being scanned in a functional MRI (fMRI) that revealed their brain activity. Is most of what you know false? Planted among these were false answers to questions the volunteers had previously answered correctly and confidently. The participants conformed to the group on these "planted" responses, giving incorrect answers nearly 70% of the time. To determine if their memory of the film had actually undergone a change, the researchers invited the subjects back to the lab later to take the memory test once again, telling them that the answers they had previously been fed were not those of their fellow film watchers, but random computer generations. Some of the responses reverted back to the original, correct ones, but get this: despite finding out the scientists messed with their minds, close to half of their responses remained erroneous, implying that the subjects were relying on false memories implanted in the earlier session. An analysis of the fMRI data showed a strong co-activation and connectivity between two brain areas: the hippocampus and the amygdala. Social reinforcement could act on the amygdala to persuade our brains to replace a strong memory wi
Janos Haits

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    the human brain - sections, views, histology, MRI
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