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How do our eyes stay focused on what we reach for? Researchers uncover how our gaze is “anchored” in the brain
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<span>How do our eyes stay focused on what we reach for? Researchers uncover how our gaze is “anchored” in the brain</span>
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NEI-funded research sheds additional light on the machinations that ensure we don’t look away from where we are reaching
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April 20, 2022
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<p>Keeping our eyes focused on what we reach for, such as a ground ball on the baseball field, may appear seamless, but, in fact, is due to a complex neurological process involving intricate timing and coordination. Pictured is NYU shortstop Zane Baker ('22). Photo credit: NYU Athletic Communications</p>
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<p>Keeping our eyes focused on what we reach for, whether it be an item at the grocery store or a ground ball on the baseball field, may appear seamless, but, in fact, is due to a complex neurological process involving intricate timing and coordination. In a newly published <a href="https://www.nature.com/articles/s41586-022-04631-2">study</a> in the journal <em>Nature</em>, a team of researchers sheds additional light on the machinations that ensure we don’t look away from where we are reaching.</p><p>The work centers on a form of coordinated looking and reach called “gaze anchoring”—the temporary stoppage of eye movements in order to coordinate reaches.</p><p>“Our results show that we anchor our gaze to the target of the reach movement, thereby looking at that target for longer periods,” explains Bijan Pesaran, a professor at NYU’s Center for Neural Science and one of the paper’s authors. “This is what makes our reaches much more accurate. The big question has been: How does the brain orchestrate this kind of natural behavior?”</p><p>The study, conducted with Maureen Hagan, a neuroscientist at Australia’s Monash University, explores the frequently studied but not well understood process of gaze anchoring—in particular, how different regions of the brain communicate with each other.</p><p>To examine this phenomenon, the scientists studied brain activity in the arm and eye movement regions of the brain at the same time as non-human primates performed a sequence of eye and arm movements. The first movement was a coordinated look-and-reach to a target. Then, as little as 10 milliseconds later, a second target was presented that subjects needed to look at as quickly as possible. This second eye movement revealed the gaze anchoring effect. These movements are similar to those made when changing the radio while driving and attending to a traffic light—if you quickly look away from the radio to the traffic light, you might not select the right channel.</p><p><a href="https://www.nyu.edu/about/news-publications/news/2022/april/how-do-our-eyes-stay-focused-on-what-we-reach-for--researchers-u.html">To read more, go to New York University News</a></p>
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