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Brain Control 'memory' Via a Region That Grabs Images
Previous experiments have shown that the nerve cells in V2 code for elementary features such as pieces of contour and patches of colour. And V2 codes these features with reference to objects.
For instance, a vertical line is coded either as the contour of an object on the left or as a contour of an object on the right.
During the study, the researchers presented sequences of images consisting of a briefly flashed square followed by a vertical line, and then compared the nerve cells' responses to the line when it was preceded by a square on the left and when it was preceded by a square on the right.
The recordings revealed that the V2 cells remember the side on which the square had been presented, which means that the flashing square set up a representation in the brain that persisted even after the image of the square was extinguished.
Von der Heydt said that although the research is only a small piece of the "how people see and process images" puzzle, but it's very important.
The results of the study may eventually make it possible to understand the mechanism of this phenomenon and to identify factors that can enhance or reduce this important function.
It could further help researchers in unravelling the causes of - and perhaps even identifying treatment for - disorders such as attention deficit disorder and dyslexia.
The study has been published in a recent issue of the journal Neuron.
Source-ANI
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