Lateral and Medial Ventral Occipitotemporal Regions Interact During the Recognition of Images Revealed from Noise

Barbara Nordhjem*, Branisalava Curcic-Blake, Anne Marthe Meppelink, Remco J Renken, Bauke M de Jong, Klaus L Leenders, Teus van Laar, Frans W Cornelissen

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Several studies suggest different functional roles for the medial and the lateral sections of the ventral visual cortex in object recognition. Texture and surface information is processed in medial sections, while shape information is processed in lateral sections. This begs the question whether and how these functionally specialized sections interact with each other and with early visual cortex to facilitate object recognition. In the current research, we set out to answer this question. In an fMRI study, 13 subjects viewed and recognized images of objects and animals that were gradually revealed from noise while their brains were being scanned. We applied dynamic causal modeling (DCM) a method to characterize network interactions to determine the modulatory effect of object recognition on a network comprising the primary visual cortex (V1), the lingual gyrus (LG) in medial ventral cortex and the lateral occipital cortex (LO). We found that object recognition modulated the bilateral connectivity between LG and LO. Moreover, the feed-forward connectivity from Vito LG and LO was modulated, while there was no evidence for feedback from these regions to V1 during object recognition. In particular, the interaction between medial and lateral areas supports a framework in which visual recognition of objects is achieved by networked regions that integrate information on image statistics, scene content and shape rather than by a single categorically specialized region within the ventral visual cortex.

Original languageEnglish
Article number678
Number of pages10
JournalFrontiers in Human Neuroscience
Volume9
DOIs
Publication statusPublished - 6-Jan-2016

Keywords

  • DCM
  • fMRI
  • object recognition
  • ventral visual cortex
  • visual perception
  • DYNAMIC CAUSAL-MODELS
  • OCCIPITAL COMPLEX
  • VISUAL PATHWAY
  • CORTEX
  • ATTENTION
  • SHAPE
  • ACTIVATION
  • TEXTURE
  • FMRI
  • FORM

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