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Surface visualization of electromagnetic brain activity.

Publication ,  Journal Article
Badea, A; Kostopoulos, GK; Ioannides, AA
Published in: J Neurosci Methods
August 15, 2003

Advances in hardware and software have made possible the reconstruction of brain activity from non-invasive electrophysiological measurements over a large part of the brain. The appreciation of the information content in the data is enhanced when relevant anatomical detail is also available for visualization. Different neuroscientific questions give rise to different requirements for optimal superposition of structure and function. Most available software deal with scalar measures of activity, especially hemodynamic changes. In contrast, the electrophysiological observables are generated by electrical activity, which depends on the synchrony of neuronal assemblies and the geometry of the local cortical surface. We describe methods for segmentation and visualization of spatio-temporal brain activity, which allow the interplay of geometry and scalar as well as vector properties of the current density directly in the representations. The utility of these methods is demonstrated through displays of tomographic reconstructions of early sensory processing in the somatosensory and visual modality extracted from magnetoencephalography (MEG) data. The activation course characteristic to a specific area could be observed as current density or statistical maps independently and/or contrasted to the activity in other areas or the whole brain. MEG and functional magnetic resonance imaging (fMRI) activations were simultaneously visualized. Integrating and visualizing complementary functional data into a single environment helps evaluating analysis and understanding structure/function relationships in normal and diseased brain.

Duke Scholars

Published In

J Neurosci Methods

DOI

ISSN

0165-0270

Publication Date

August 15, 2003

Volume

127

Issue

2

Start / End Page

137 / 147

Location

Netherlands

Related Subject Headings

  • Somatosensory Cortex
  • Photic Stimulation
  • Neurons
  • Neurology & Neurosurgery
  • Nerve Net
  • Models, Neurological
  • Magnetoencephalography
  • Magnetic Resonance Imaging
  • Imaging, Three-Dimensional
  • Image Processing, Computer-Assisted
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Badea, A., Kostopoulos, G. K., & Ioannides, A. A. (2003). Surface visualization of electromagnetic brain activity. J Neurosci Methods, 127(2), 137–147. https://doi.org/10.1016/s0165-0270(03)00100-6
Badea, Alexandra, George K. Kostopoulos, and Andreas A. Ioannides. “Surface visualization of electromagnetic brain activity.J Neurosci Methods 127, no. 2 (August 15, 2003): 137–47. https://doi.org/10.1016/s0165-0270(03)00100-6.
Badea A, Kostopoulos GK, Ioannides AA. Surface visualization of electromagnetic brain activity. J Neurosci Methods. 2003 Aug 15;127(2):137–47.
Badea, Alexandra, et al. “Surface visualization of electromagnetic brain activity.J Neurosci Methods, vol. 127, no. 2, Aug. 2003, pp. 137–47. Pubmed, doi:10.1016/s0165-0270(03)00100-6.
Badea A, Kostopoulos GK, Ioannides AA. Surface visualization of electromagnetic brain activity. J Neurosci Methods. 2003 Aug 15;127(2):137–147.
Journal cover image

Published In

J Neurosci Methods

DOI

ISSN

0165-0270

Publication Date

August 15, 2003

Volume

127

Issue

2

Start / End Page

137 / 147

Location

Netherlands

Related Subject Headings

  • Somatosensory Cortex
  • Photic Stimulation
  • Neurons
  • Neurology & Neurosurgery
  • Nerve Net
  • Models, Neurological
  • Magnetoencephalography
  • Magnetic Resonance Imaging
  • Imaging, Three-Dimensional
  • Image Processing, Computer-Assisted