专题学术讲座
4月7日北大学术报告- Stephen Engel
发布时间：2015-04-07关键字：
麦戈文脑科学研究所学术讲座
题目：The adaptive brain: Learning to see in altered visual worlds
报告人：Prof. Stephen A. Engel University of Minnesota
时间：Apr 7, Tue, 1:00-2:30 PM
地点：Room 1113, Wang Kezhen Building, Peking University
邀请人：Prof. Fang Fang
摘要：Understanding adult neural plasticity is a long-standing goal in neuroscience. In the visual system, neural function alters dramatically as people adapt to changes in their visual world, such as increases or decreases in brightness or clarity. Most past work on visual adaptation, however, has altered visual input only over the short-term, typically a few minutes. I will present a series of experiments that investigate adaptation over a much longer term, from tens of minutes up to 4 days. We use recently developed “altered reality” technology in which subjects view the world through virtual reality goggles that display processed video acquired from a head mounted camera. Image manipulations targeted early visual cortex, and adaptation was measured with perceptual tests. Adaptation grew stronger and longer-lasting as the adapting duration extended from minutes to hours to days. Effects of different adapting durations were behaviorally distinguishable from on another, suggesting that adaptation is controlled by a continuum of neural mechanisms. Classical shorter-term effects of adaptation showed a surprising reversal after about a day. Adapting likely has functional costs that led to this decline, but multi-day adaptation appeared able to overcome these costs. The ability to control adaptation at different timescales may allow vision to perform near optimally in an ever-changing world.
欢迎各位老师同学积极参加！
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