Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Estimation of interpolation errors in scalp topographic mapping

E M Fletcher1, C L Kussmaul, G R Mangun

  • 1Department of Computer Science, University of California, Davis 95616, USA.

Electroencephalography and Clinical Neurophysiology
|May 1, 1996
PubMed
Summary

Accurate topographic maps from EEG and ERP data depend more on electrode density than the interpolation method. For shallow sources, minimize error by adjusting electrode spacing based on potential gradient and distance.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Perceptual Expertise and Attention: An Exploration using Deep Neural Networks.

bioRxiv : the preprint server for biology·2024
Same author

Dissociation of brain activity related to syntactic and semantic aspects of language.

Journal of cognitive neuroscience·2013
Same author

Monitoring the visual world: hemispheric asymmetries and subcortical processes in attention.

Journal of cognitive neuroscience·2013
Same author

Independent attentional scanning in the separated hemispheres of split-brain patients.

Journal of cognitive neuroscience·2013
Same author

Signal enhancement and suppression during visual-spatial selective attention.

Brain research·2010
Same author

Tonotopy in human auditory cortex examined with functional magnetic resonance imaging.

Human brain mapping·2010

Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Signal Processing

Background:

  • Topographic maps are crucial for visualizing electrical scalp activity (EEG, ERP).
  • Current accuracy assessments rely on global measures and visual inspection, lacking local detail.
  • Understanding interpolation error factors is vital for reliable topographic mapping.

Purpose of the Study:

  • To explore and quantify the relationship between interpolation error and global/local factors using simulations.
  • To identify key determinants of interpolation accuracy in topographic mapping.
  • To provide guidance for optimizing electrode placement and interpolation strategies.

Main Methods:

  • Simulations were used to analyze various interpolation methods for topographic map generation.

Related Experiment Videos

  • Error metrics were evaluated against global factors (e.g., electrode density) and local factors (e.g., potential gradient, electrode distance).
  • Correlation analyses were performed to identify significant relationships between error and contributing factors.

    • Main Results:

    • Adequate electrode density is a primary factor for accuracy among effective interpolation methods.
    • For shallow sources, local interpolation error correlates most strongly with potential gradient and the product of gradient and distance.
    • Interelectrode distance inversely proportional to potential gradient can locally control interpolation error.

    Conclusions:

    • Electrode density is more critical than the specific interpolation method for accurate topographic maps.
    • Local interpolation error is influenced by potential gradient and electrode proximity, especially for shallow sources.
    • Strategic electrode placement, considering potential gradients, can mitigate interpolation errors in topographic mapping.