欢迎光临中国科学院心理研究所!
» 您的位置:首页 > 其它功能 > 近期学术活动
学术讲座: The adaptive brain: Learning to see in altered visual worlds
作者: 科研业务处 ║ 日期: 2015/03/31 

Speaker: Prof. Stephen A. Engel
  University of Minnesota
Time:      10:30am – 12:00pm
Date:      Apr 8 (Wed), 2015
Venue:   心理所南楼8层会议室

Abstract: 
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 one 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.

版权所有:中国科学院心理研究所 备案编号:京ICP备10049795 京公网安备110402500018号
地址:北京市朝阳区林萃路16号院 邮编:100101 电话:(86-10)64879520
Email:webmaster@psych.ac.cn