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

Alex Clarke*, Barry J. Devereux, Lorraine K. Tyler

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)
568 Downloads (Pure)

Abstract

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 modSaveel 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.

Original languageEnglish
Pages (from-to)1590-1605
Number of pages16
JournalJournal of cognitive neuroscience
Volume30
Issue number11
Early online date28 Sep 2018
DOIs
Publication statusPublished - Nov 2018

ASJC Scopus subject areas

  • Cognitive Neuroscience

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