Dr.Shin'ya Nishida

时间： 2012-06-21 11:00 - 13:00

地点： 哲学楼103房间

The human brain processes different aspects of the surrounding environment through multiple sensory modalities, and each modality can be subdivided into multiple attribute-specific channels. Temporal synchrony is a critical cue for the brain to rebind sensory information across different channels. We have shown that judgments about cross-channel temporal relations, including synchrony, are based on the comparison of salient features (time markers) extracted from, and presumably time-locked to, early evoked sensory signals [1]. We have also shown that the point of subjective synchrony is recalibrated after prolonged exposure to constant delays [2]. These findings are consistent with the view that the perceived timing of an event is the brain’s estimation of the time the event occurs in the world (event time) rather than the time the processing of the event completes in the brain (brain time). We also found that the temporal limit of synchrony-based attribute binding is low and common (2-3 items/sec), which suggests that binding synchronous attributes is subserved by a universal, central neural mechanism [3].

[1] Nishida, S. & Johnston, A. (2002). Current Biology, 12(3), 359-368.; Nishida, S. & Johnston, A. (2010). Chapter 17 in Nijihawan, R. & Khurana, B. Eds, "Problems of Space and Time in Perception and Action", Cambridge University Press.

[2] Fujisaki, W., Shimojo, S., Kashino, M. & Nishida, S. (2004). Nature Neuroscience, 7(7), 773-778.

[3]Fujisaki, W. & Nishida, S. (2010). Proc Biol Sci. 2010 Mar 24.

2012-06-21

2012-06-21