New Method for the Study of Spontaneous Brain Activity.

Abstract

A new method has been developed to characterize the sources of spontaneous brain activity measured magnetically while avoiding any specific model for the neural generators. In an application of the technique, individual spindles of the alpha rhythm monitored by a set of 14 magnetic sensors fixed over the occipital lobe were characterized as vectors in a 14-dimensional signal space. Taking the noise level into account, the number of distinct vectors could be determined, which indicates the number of sources that differ in their geometrical attributes such as position, orientation, and extent. In a pilot study of about 30 spindles for each of two subjects, virtually all sources were distinguishable from the others, implying a large set of underlying generators. Keywords: Magnetoencephalograms.

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Document Details

Document Type
Technical Report
Publication Date
Feb 28, 1988
Accession Number
ADA193813

Entities

People

  • R. J. Ilmoniemi
  • Samuel J. Williamson
  • W. E. Hostetler

Organizations

  • New York University

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Biomedical Research
  • Brain
  • Cerebral Cortex
  • Classification
  • Data Analysis
  • Demographic Cohorts
  • Detection
  • Detectors
  • Frequency
  • Magnetic Detectors
  • Magnetic Fields
  • Magnetometers
  • New York
  • Physical Properties
  • Psychology
  • Scientific Research
  • Security

Readers

  • Neuroscience
  • Regression Analysis.
  • Theoretical Analysis.

Technology Areas

  • Space