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Archive for the ‘neuroscienze/neurosciences’ Category

So now there’s some physiological evidence to the old adage: God helps those who help themselves. The placebo effect has been regarded in ways as diverse as “A magical mystical self healing tool” and “A treacherous trick from some crackpot’s pot”. This piece of research sheds some light on the psychological traits that allow the effect to take place – and there’s some lightness indeed.

 

Neuroscientist Jon-Kar Zubieta of the University of Michigan

 

 “… found that people with certain personality traits—specifically, those who scored high on resiliency, altruism, and straightforwardness, and low on measures of “angry hostility”—were more likely to experience a placebo-induced painkilling response. Importantly, such individuals also had decreased cortisol levels and greater activation of endogenous opioid receptors in brain regions associated with reward.”

 

While Tor Wager, a neuroscientist at the University of Boulder, Colorado (not involved in the study), comments:

 

“Studies like this are giving us a new set of candidate personality measures that can predict for placebo analgesia, and they’re mostly positive traits,” said Wager. “So placebo responders are being cast in a much more positive light, personality-wise, than they were a few decades ago, when they were thought to be hysterical and neurotic. ”

Personality Predicts Placebo Effect | The Scientist Magazine®.

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Neuroscience: Idle minds : Nature News & Comment.

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http://www.chalmers.se/en/news/Pages/Nerve-cells-grow-on-nanocellulose.aspx

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L’uomo sconfigge il computer. Nel campionato Usa di parole crociate Dr. Fill arriva solo 141esimo su 600 – Il Sole 24 ORE.

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“In acorn worm embryos, a forebrain-like signalling centre switches on in the proboscis; a midbrain-like one is active in the collar of tissue just below the proboscis; and a hindbrain-like centre can be found where the collar meets the worm’s trunk.”

viaMarine worm rewrites theory of brain evolution : Nature News & Comment.

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Namely: I want to increase my dopamine receptors regardless of social staus. Brain dopamine receptor density correlates with social status.

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“Ctenophores present a nervous system which is very similar to that found in Cnidaria, the other phylum that is composed of animals with radial symmetry. This nervous system is organized mainly as a nervous network, in which each neuron is connected to many others in a seemingly random fashion. No central control is found here; the nervous systems of radial animals are the best example, in nature, of a diffuse nervous system. Two interconnected networks, one in the epidermis and one at the basis of the gastrodermis, are found. The axons from the neurons in this network terminate either in other neurons, or in junctions with sensorial or effector organs.”via“And through strange aeons, even Death may die” – The Descent of Brain Blog | Nature Publishing Group.

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