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

On-line source-density computation with a minimum of electrodes.

D M MacKay

    Electroencephalography and Clinical Neurophysiology
    |December 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    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

    Transport of organic contaminants in groundwater.

    Environmental science & technology·2012
    Same author

    Analytical method for the sorption of hydrophobic organic pollutants in clay-rich materials.

    Environmental science & technology·2011
    Same author

    Direct Detection of Residual Nonaqueous Phase Liquid in the Saturated Zone Using SF6 as a Partitioning Tracer.

    Environmental science & technology·2011
    Same author

    Systematic reviews and Cochrane collaboration. Cochrane library is now available free to people working in NHS.

    BMJ (Clinical research ed.)·2001
    Same author

    Predicting impacts of ground water contamination.

    Environmental science & technology·2001
    Same author

    Scalp topography of ERP source-densities during visually guided target practice.

    Experimental brain research·1986

    This study presents an economical analog method to approximate the scalp potential Laplacean using adapted electroencephalography (EEG) amplifiers. Equilateral triangular electrode arrays enable efficient computation of scalp source densities at multiple locations with minimal electrodes.

    Area of Science:

    • Neuroscience
    • Biomedical Engineering
    • Computational Electrophysiology

    Background:

    • Accurate computation of the scalp potential Laplacean is crucial for estimating neural source activity.
    • Conventional methods for Laplacean estimation can be computationally intensive or require complex electrode configurations.

    Purpose of the Study:

    • To describe an economical analog method for approximating the scalp potential Laplacean.
    • To demonstrate the efficiency of using adapted electroencephalography (EEG) amplifiers for this computation.

    Main Methods:

    • The proposed method utilizes a simple adaptation of conventional EEG amplifier input stages.
    • Electrodes are arranged in equilateral triangular arrays for optimal efficiency.
    • Analog computation of the second spatial derivative (Laplacean) of the scalp potential distribution (Δ²V/Δx² + Δ²V/Δy²) is performed.

    Related Experiment Videos

    Main Results:

    • The method provides an approximate computation of the scalp potential Laplacean.
    • The use of equilateral triangular arrays facilitates efficient calculation.
    • Approximate source densities can be computed at 7 scalp locations using only 13 electrodes.

    Conclusions:

    • This analog approach offers an economical and efficient solution for estimating scalp potential Laplacean.
    • The method simplifies the process of source density estimation in electroencephalography.
    • The electrode configuration maximizes computational efficiency with a reduced number of electrodes.