Tuesday, November 21, 2006
How To Keep A Steady Eye
University of Pittsburgh (USA), 20 November: Researchers have identified a brain circuit that they believe enables us to view the world stably even though our eyes move constantly.
It’s well known that, when viewing a scene, our eyes flit around from one location to another. Yet our perception of the scene remains steady. Online this week in Nature, Marc Sommer and Robert Wurtz describe a brain circuit that may control this perceptual stability in monkeys.
The circuit relays information about these quick eye movements from the midbrain via the thalamus to the frontal cortex, where neurons alter their receptive field to anticipate the effects of the movements. A similar circuit is likely to exist in human brains, the authors say.
(ResearchSEA)
It’s well known that, when viewing a scene, our eyes flit around from one location to another. Yet our perception of the scene remains steady. Online this week in Nature, Marc Sommer and Robert Wurtz describe a brain circuit that may control this perceptual stability in monkeys.
The circuit relays information about these quick eye movements from the midbrain via the thalamus to the frontal cortex, where neurons alter their receptive field to anticipate the effects of the movements. A similar circuit is likely to exist in human brains, the authors say.
(ResearchSEA)
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