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Cross-Modal Multivariate Pattern Analysis
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Cross-Modal Multivariate Pattern Analysis

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Decoding natural scenes based on sounds of objects within scenes using multivariate pattern analysis.

Xiaojing Wang1, Jin Gu1, Junhai Xu1

  • 1College of Intelligence and Computing, Tianjin Key Laboratory of Cognitive Computing and Application, Tianjin University, Tianjin, 300350, China.

Neuroscience Research
|December 5, 2018
PubMed
Summary
This summary is machine-generated.

This study reveals the occipitotemporal cortex processes scene information using object sounds. Brain regions like the posterior fusiform area (pF) and lateral occipital area (LO) show cross-modal scene decoding capabilities.

Keywords:
Cross modalityFunctional connectivityMultivariate pattern analysisScene decodingfMRI

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Sensory Processing

Background:

  • Scene recognition is vital for spatial navigation and classification.
  • The occipitotemporal cortex's role in linking scene visuals with object sounds remains unclear.

Purpose of the Study:

  • To investigate if the occipitotemporal cortex represents semantic associations between scenes and object sounds.
  • To determine if scene-specific patterns can be predicted from object sound-evoked patterns.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was employed.
  • Multivariate pattern analysis (MVPA) was used to decode brain activity.
  • Functional connectivity and seed-to-voxel analyses were conducted.

Main Results:

  • Scene patterns were predictable from object sound patterns in the posterior fusiform area (pF), lateral occipital area (LO), and superior temporal sulcus (STS).
  • Functional connectivity revealed correlations between pF, LO, and the parahippocampal place area (PPA), but not STS.
  • A distinct cross-modal processing network involving STS was identified.

Conclusions:

  • The occipitotemporal cortex exhibits a cross-modal channel for scene decoding via object sounds.
  • This finding complements existing single-modal scene decoding mechanisms.
  • Object sounds contribute to scene representation in the brain.