How do we manage to recognize a friend’s face, regardless of the light conditions, the person’s hairstyle or make-up? Why do we always hear the same words, whether they are spoken by a man or woman, in a loud or soft voice?
Forming categories is an advanced ability of the brain. Illustration: IMP
The scientists then selected two basis sounds that produced different response patterns and constructed linear mixtures from them. When the mixture ratio was varied continuously, the answer was not a continuous change in the activity patters of the nerve cells, but rather an abrupt transition. Such dynamic behavior is reminiscent of the behavior of artificial attractor-networks that have been suggested by computer scientists as a solution to the categorization problem.
The paper "Discrete neocortical dynamics predict behavioural categorization of sounds" by Brice Bathellier et al. was published in the journal Neuron on October 18, 2012.About Simon Rumpel
Dr. Heidemarie Hurtl | idw
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