從來都沒有人想過，把人腦的時間特性和空間特性合在一起研究！
 
歷年以來的學者，對於人的注意力的研究大多採取探索空間特性的fMRI腦造影，或者是探索時間特性的腦磁圖或腦電圖M/EEG。我們都知道人的注意力與選擇性處理是人腦的時空特性的產物，卻沒有人將時間與空間合在一起討論。
 
這次的演講會探索由上而下的注意力（Top-down attention）調節人腦對於物體選擇性的認知與神經機制。講者以特殊的整合時空角度，採用多方法的證據（統合MEG、fMRI和深度神經網路DNN），綜合探討注意力現象的時空特性。
 
想聽關於選擇性注意力的懶人包嗎？來聽聽看就對了！

講題：The spatiotemporal neural dynamics of object selectivity: an MEG-fMRI-DNN fusion study

講者：李俊輝博士後研究員 (國立臺灣大學心理系)

時間：2024-05-03（五）13:10-15:00

地點：成大社會科學院北棟2樓心理學系階梯教室

演講語言：中文

通識講座:是
(報名連結https://activity.ncku.edu.tw/index.php?c=apply&no=14612)

演講摘要：
 Ample evidence has revealed that top-down attention can selectively modulate object processing according to task goals by enhancing responses to attended objects and suppressing responses to unattended objects in extrastriate visual areas. These selective operations are underpinned by a network of cortical regions with specific temporal dynamics of neural activities. Many studies have indeed investigated the neural responses to object perception and selective attention in space using functional magnetic resonance imaging (fMRI) or in time using magnetoencephalography and electroencephalography (M/EEG), respectively. However, relatively little is known about the spatiotemporal properties of information processing and the underlying mechanisms through top-down attentional modulation on object selectivity. In this talk, I will present recent work that addresses the questions in a representational similarity analysis (RSA) framework. Within this framework, we investigated spatiotemporal profiles of object selectivity in the human brain by integrating neural patterns from magnetoencephalography (MEG), functional magnetic resonance imaging (fMRI) and deep neural networks (DNNs). Through the RSA-based MEG-fMRI and MEG-DNN fusion approaches, the study provides novel multivariate evidence elucidating the cognitive operations and the neural mechanisms that underlie object perception and selective attention.



個人CV：詳見附檔 CV_Chun-Hui Li.pdf

與講題相關之參考文獻：
Baldauf, D., & Desimone, R. (2014). Neural mechanisms of object-based attention. Science, 344(6182), 424–427.
Cichy, R. M., & Oliva, A. (2020). A M/EEG-fMRI fusion primer: resolving human brain responses in space and time. Neuron, 107(5), 772-781.