visualization of evoked eeg responses: trivector visualization emil jovanov jovanov...
TRANSCRIPT
Visualization of Evoked EEG Responses: Trivector Visualization
Emil Jovanov
http://www.ece.uah.edu/[email protected]
Associate ProfessorElectrical and Computer Eng. Dept. University of Alabama in Huntsville
March 19, 2004 IHMC 2004 2
Visualization of Evoked Potentials
EP - Insight into spatio-temporal dynamics of brain electrical activity
Important for cognitive studies
Animated 3D visualization improves perception of underlying activityTempo EP visualization environment
Quest for the right paradigm
Trivector NeuroScan (TVR) methodQuantitative analysis of activityScalar Assessment of Neurological Cognitive Deficits
March 19, 2004 IHMC 2004 3
3D Topographic Map EEG ERP
March 19, 2004 IHMC 2004 4
TriVector – Electrodes
March 19, 2004 IHMC 2004 5
2D plot example
March 19, 2004 IHMC 2004 6
TriVector – 3D Animation
3-D Animated VisualizationAnimated visualization of the electrical evoked potential magnitude vectors
Virtual Source (red ball)Fade out positionsStrength & directionDynamic animation as they sweep through the brain during interrogation via random or expected audio/visual stimuli
March 19, 2004 IHMC 2004 7
Trivector 3D Animation
March 19, 2004 IHMC 2004 8
Trivector 3D Animation
March 19, 2004 IHMC 2004 9
TVR conclusion and future work
Promising combination of EEG ERP and TVR ERP dataReal time analysis of the cognitive workloadPortable implementationResearch issues
Cognitive studiesDiagnostic applicationsPerceptual issuesThe role of artifacts