title: Increasingly complex representations of natural movies across the dorsal stream are shared between subjects.
abstract: Recently, deep neural networks (DNNs) have been shown to provide accurate predictions of neural responses across the ventral visual pathway. We here explore whether they also provide accurate predictions of neural responses across the dorsal visual pathway, which is thought to be devoted to motion processing and action recognition. This is achieved by training deep neural networks to recognize actions in videos and subsequently using them to predict neural responses while subjects are watching natural movies. Moreover, we explore whether dorsal stream representations are shared between subjects. In order to address this question, we examine if individual subject predictions can be made in a common representational space estimated via hyperalignment. Results show that a DNN trained for action recognition can be used to accurately predict how dorsal stream responds to natural movies, revealing a correspondence in representations of DNN layers and dorsal stream areas. It is also demonstrated that models operating in a common representational space can generalize to responses of multiple or even unseen individual subjects to novel spatio-temporal stimuli in both encoding and decoding settings, suggesting that a common representational space underlies dorsal stream responses across multiple subjects.
authors.affiliation: Radboud University, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands. Electronic address: u.guclu@donders.ru.nl.
authors.forename: Umut
authors.initials: U
authors.lastname: Güçlü
authors.affiliation: Radboud University, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands.
authors.forename: Marcel A J
authors.initials: MAJ
authors.lastname: van Gerven
mesh_terms: D000328:Adult; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D009040:Motion Pictures; D016571:Neural Networks, Computer; D014795:Visual Pathways / Q000000981:diagnostic imaging / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*
keywords: Decoding; Deep neural network; Dorsal stream; Encoding; Hyperalignment