Meta-Modal Information Flow: A Method for Capturing Multimodal Modular Disconnectivity in Schizophrenia.

Journal Article (Journal Article)

OBJECTIVE: Multimodal measurements of the same phenomena provide complementary information and highlight different perspectives, albeit each with their own limitations. A focus on a single modality may lead to incorrect inferences, which is especially important when a studied phenomenon is a disease. In this paper, we introduce a method that takes advantage of multimodal data in addressing the hypotheses of disconnectivity and dysfunction within schizophrenia (SZ). METHODS: We start with estimating and visualizing links within and among extracted multimodal data features using a Gaussian graphical model (GGM). We then propose a modularity-based method that can be applied to the GGM to identify links that are associated with mental illness across a multimodal data set. Through simulation and real data, we show our approach reveals important information about disease-related network disruptions that are missed with a focus on a single modality. We use functional MRI (fMRI), diffusion MRI (dMRI), and structural MRI (sMRI) to compute the fractional amplitude of low frequency fluctuations (fALFF), fractional anisotropy (FA), and gray matter (GM) concentration maps. These three modalities are analyzed using our modularity method. RESULTS: Our results show missing links that are only captured by the cross-modal information that may play an important role in disconnectivity between the components. CONCLUSION: We identified multimodal (fALFF, FA and GM) disconnectivity in the default mode network area in patients with SZ, which would not have been detectable in a single modality. SIGNIFICANCE: The proposed approach provides an important new tool for capturing information that is distributed among multiple imaging modalities.

Full Text

Duke Authors

Cited Authors

  • Falakshahi, H; Vergara, VM; Liu, J; Mathalon, DH; Ford, JM; Voyvodic, J; Mueller, BA; Belger, A; McEwen, S; Potkin, SG; Preda, A; Rokham, H; Sui, J; Turner, JA; Plis, S; Calhoun, VD

Published Date

  • September 2020

Published In

Volume / Issue

  • 67 / 9

Start / End Page

  • 2572 - 2584

PubMed ID

  • 31944934

Pubmed Central ID

  • PMC7538162

Electronic International Standard Serial Number (EISSN)

  • 1558-2531

Digital Object Identifier (DOI)

  • 10.1109/TBME.2020.2964724


  • eng

Conference Location

  • United States