Neural circuits that control eye movements play multiple roles in visual attention
With so many visual stimuli bombarding our eyes -- cars whizzing by, leaves fluttering -- how can we focus attention on a single spot -- a word on a page or a fleeting facial expression? How do we filter so purely that the competing stimuli never even register in our awareness?
A pair of Princeton scientists have found that it has a lot to do with the brain circuits that control eye movements. Neuroscientists Tirin Moore and Katherine Armstrong showed that these brain circuits serve a double function: In addition to programming eye movements, they also trigger amplification or suppression of signals that pour in from the locations where the eyes could move.
Steven Schultz | EurekAlert!
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In living cells, enzymes drive biochemical metabolic processes enabling reactions to take place efficiently. It is this very ability which allows them to be used as catalysts in biotechnology, for example to create chemical products such as pharmaceutics. Researchers now identified an enzyme that, when illuminated with blue light, becomes catalytically active and initiates a reaction that was previously unknown in enzymatics. The study was published in "Nature Communications".
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