As you look around, mental images bounce between right and left brain

Ask anyone from an NFL quarterback scanning the field for open receivers, to an air traffic controller monitoring the positions of planes, to a mom watching her kids run around at the park: We depend on our brain to hold what we see in mind, even as we shift our gaze around and even temporarily look away. This capability of “visual working memory” feels effortless, but a new MIT study shows that the brain works hard to keep up. Whenever a key object shifts across our field of view—either because it moved or our eyes did—the brain immediately transfers a memory of it by re-encoding it among neurons in the opposite brain hemisphere.

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