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Oscillatory Dynamics of Perceptual to Conceptual Transformations in the Ventral Visual Pathway

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posted on 2023-07-26, 14:28 authored by Alex Clarke, Barry J. Devereux, Lorraine K. Tyler
Object recognition requires dynamic transformations of low-level visual inputs to complex semantic representations. Although this process depends on the ventral visual pathway, we lack an incremental account from low-level inputs to semantic representations and the mechanistic details of these dynamics. Here we combine computational models of vision with semantics and test the output of the incremental model against patterns of neural oscillations recorded with magnetoencephalography in humans. Representational similarity analysis showed visual information was represented in low-frequency activity throughout the ventral visual pathway, and semantic information was represented in theta activity. Furthermore, directed connectivity showed visual information travels through feedforward connections, whereas visual information is transformed into semantic representations through feedforward and feedback activity, centered on the anterior temporal lobe. Our research highlights that the complex transformations between visual and semantic information is driven by feedforward and recurrent dynamics resulting in object-specific semantics

History

Refereed

  • Yes

Volume

30

Issue number

11

Page range

1590-1605

Publication title

Journal of Cognitive Neuroscience

ISSN

1530-8898

Publisher

Massachusetts Institute of Technology Press

File version

  • Published version

Language

  • eng

Legacy posted date

2018-10-26

Legacy creation date

2018-10-26

Legacy Faculty/School/Department

Faculty of Science & Engineering

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