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華南師范大學心理學院

通知公告

第102期心理沙龍-沈路博士

2019-09-09 10:05:00 來源:華南師范大學心理學院 點擊: 收藏本文

題目:How neural oscillations influence visual perception: evidence from perceptual inference and electrical stimulation studies

 

報告人:沈路 博士

 

時間:2019912日(本周四)16:00-17:00

 

地點:心理學院301會議室

 

摘要:It has been proposed that visual perception is an inference process, which involves both the feedback and feedforward influences. Moreover, accumulating evidence demonstrate that intrinsic neural oscillations could modulate visual perception. However, it remains poorly understood how the brain employs its intrinsic oscillations to build up specific percepts. In this talk, I will first present insights from an empirical study using electroencephalography and intracranial recordings, demonstrating the critical role of alpha oscillations in generating specific percepts. Then, to directly characterize the property of neural oscillations in human visual system, I will further introduce an electrical stimulation study, which recorded cortico-cortical evoked potentials (CCEPs), to investigate how the human visual system employs different neural oscillations for information sending along the feedback and feedforward pathway. Our study showed that, in human visual cortex, alpha oscillatory phase and power directly influenced the strength of feedback connections, while gamma power directly influenced the strength of feedforward connections.

 

報告人簡介:沈路博士,華南師范大學特聘副研究員,先后在法國國家科學研究院腦與認知研究中心,以及荷蘭唐德思腦、認知與行為中心聯合培養和訪學。主要使用心理物理法,fMRI, EEG以及sEEG等技術探究視知覺加工的神經機制,在PLoS Biology等高水平期刊上發表過論文。


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