neurology   3316

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Does Free Will Exist? Neuroscience Can't Disprove It Yet. - The Atlantic
Two years later, Schurger and his colleagues Jacobo Sitt and Stanislas Dehaene proposed an explanation. Neuroscientists know that for people to make any type of decision, our neurons need to gather evidence for each option. The decision is reached when one group of neurons accumulates evidence past a certain threshold. Sometimes, this evidence comes from sensory information from the outside world: If you’re watching snow fall, your brain will weigh the number of falling snowflakes against the few caught in the wind, and quickly settle on the fact that the snow is moving downward.

But Libet’s experiment, Schurger pointed out, provided its subjects with no such external cues. To decide when to tap their fingers, the participants simply acted whenever the moment struck them. Those spontaneous moments, Schurger reasoned, must have coincided with the haphazard ebb and flow of the participants’ brain activity. They would have been more likely to tap their fingers when their motor system happened to be closer to a threshold for movement initiation.

This would not imply, as Libet had thought, that people’s brains “decide” to move their fingers before they know it. Hardly. Rather, it would mean that the noisy activity in people’s brains sometimes happens to tip the scale if there’s nothing else to base a choice on, saving us from endless indecision when faced with an arbitrary task. The Bereitschaftspotential would be the rising part of the brain fluctuations that tend to coincide with the decisions. This is a highly specific situation, not a general case for all, or even many, choices.
philosophy  neurology 
3 days ago by gsanders
Communication between neural networks
The study combines three prominent explanatory models that have been proposed in recent years: synfire communication, communication through coherence and communication through resonance.
neural-oscillations  neurology 
9 days ago by asl2
It’s red, even if we can’t say it | Cosmos
 a lesion in the left region of his brain, which apparently severed his memory of colour names from his visual perception of colours and his language system.
psychology  neurology  color 
12 days ago by asl2
Study may show why drugs cure brain disorders in mice but not us - STAT
“The assumption with model organisms is that neurotransmitters have receptors on the same neurons that humans do,” Lein said. Since that’s apparently not the case, it suggests that “serotonin or glutamate could have very different effects in humans than in mice.” And that, in turn, means that a drug acting on serotonin or glutamate circuitry could affect a mouse very differently than a human.
inmice  neurology  drugs 
13 days ago by yorksranter
Why Some Doctors Purposely Misdiagnose Patients - The Atlantic
> Hundreds of people say a Michigan doctor falsely diagnosed them with epilepsy
epilepsy  medicine  neurology 
29 days ago by porejide
Brain Simulation Promised a Decade Ago Hasn't Succeeded - The Atlantic
. In his closing words, he claimed that in 30 years, “we are going to ingest information. You’re going to swallow a pill and know English. You’re going to swallow a pill and know Shakespeare. And the way to do it is through the bloodstream. So once it’s in your bloodstream, it basically goes through it and gets into the brain, and when it knows that it’s in the brain, in the different pieces, it deposits it in the right places.”

Over my left shoulder, a hushed voice whispered, “Wow.”
brain  neurology  simulation  bullshit  science  negroponte 
7 weeks ago by yorksranter

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