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Video Synchronization in Schizophrenia

INCF Workshop, Chennai, IITM & IMSc, 5-7 Nov. 2012. Video Synchronization in Schizophrenia. Kaushik Majumdar, ISI Bangalore Joint work with Pradeep D. Prasad (ISI), John P John (NIMHANS), H. N. Harsha (NIMHANS). https://sites.google.com/site/isicng/ (Computational Neuroscience Group).

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Video Synchronization in Schizophrenia

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  1. INCF Workshop, Chennai, IITM & IMSc, 5-7 Nov. 2012 Video Synchronization in Schizophrenia Kaushik Majumdar, ISI Bangalore Joint work with Pradeep D. Prasad (ISI), John P John (NIMHANS), H. N. Harsha (NIMHANS) https://sites.google.com/site/isicng/ (Computational Neuroscience Group)

  2. Video Synchronization: Snapshot

  3. Prasad et al. Clin. EEG Neurosci. (to appear) Pairwise Hilbert Phase Synchronization

  4. Hilbert Transformation and Instantaneous Phase

  5. Phase Synchronization Prasad et al. 2012

  6. Cross Modal Task

  7. Videos • Healthy control subject http://youtu.be/4aFMQFhiRHw • Patient with schizophrenia http://youtu.be/-TECG5XQhB4

  8. Multi-channel synchronization

  9. Single Trial Ensemble Synchronization

  10. Trial Averaged Ensemble Synchronization

  11. ERSP & ITC

  12. Trial Selection

  13. Classification by Logistic Regression • 3 dimensional feature space: • Ensemble right hemispheric synchronization. • Ensemble left hemispheric synchronization. • Response latency.

  14. 2 Dimensional Projection of 3 Dimensional Feature Space Cross is patient with schizophrenia square is healthy control subject Incongruent stimulus

  15. 2 Dimensional Projection of 3 Dimensional Feature Space Congruent stimulus Plus is patient with schizophrenia circle is healthy control subject

  16. 2 Dimensional Projection of 3 Dimensional Feature Space Neutral stimulus Star is patient with schizophrenia diamond is healthy control subject

  17. Average Accuracy

  18. Probabilistic Score

  19. Reference • P. D. Prasad, H. N. Halahalli, J. P. John and K. Majumdar, “Video synchronization: a new tool for dynamic visualization of multi-channel spatiotemporal synchronization patterns,” (under review).

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