a brain scan. / Fotolia
The brain has mechanisms to forget the unnecessary information, a study published in Proceedings of the National Academy of Sciences of the United States of America (PNAS), led by scientists at the University of Lund (Sweden), which has participated Riccardo Zucca, a researcher at the Research Group Perceptive Emotive and Cognitive Systems and the Center for Neuro-Robotics and Autonomous Systems Department of Information Technology and Communication at the University Pompeu Fabra.
The brain is able to assimilate a new stimulus, but later rejected if they are similar in the time that it recognizes. So the paradox that “two stimuli produce worse results than one, but what is really happening is that the brain active neural mechanisms to avoid the energy expense of learning” is given, the authors suggested.
The neuronal activity in charge of storing information is an additional energy expenditure, so the brain forgets intentionally
The neuronal activity in charge of storing information is an additional energy expenditure, so the brain forgets intentionally, even temporarily, to save energy. When the brain has learned a particular association brake mechanism is activated learning.
physiological explanation Rescorla-Wagner model
In an article published in PNAS scientists experiment designed to draw the conclusions of the study are described. An audible tone or light signal and a blast of air that caused the blink of an eye: In the first phase, two stimuli the animal experimental model for the brain’s associate applied. Next, he was the subject blinked an eye on the time listening to the tone or light signal, even without air blast again.
Finally, to reapply the acoustic tone or light signal together with the rush of air, the association between stimuli became confused.
“The conclusions the study may explain why a stronger partnership leads to a value of less reinforcement, “says Zucca
As Zucca says,” the study’s findings can I explain why an association more Strong leads to a value of less reinforcement, in the context of unexperimento of conditioned behavior. “
Although it had been described earlier in the Rescorla-Wagner model, a model that has guided research in behavioral sciences and neurology for several decades, this phenomenon did not yet have a physiological explanation.
Scientists have studied in this paper from the Purkinje cells of the cerebellar cortex of ferrets and found that the responses of Purkinje cells , conditional triggers adaptive temporal flicker, gradually suppress the conditioned stimulus, providing for the first time physiological evidence of the phenomenon described in Rescorla-Wagner model.
Original article here
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