Accession Number : ADA261593


Title :   Imaging Regional Changes in the Spontaneous Activity of the Brain: An Extension of the Minimum-Norm Least-Squares Estimate


Descriptive Note : Manuscript rept. 1 Feb 1992-14 Feb 1993


Corporate Author : NEW YORK UNIV NY


Personal Author(s) : Wang, Jia Z ; Kaufman, Lloyd ; Williamson, Samuel J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a261593.pdf


Report Date : 20 Jan 1993


Pagination or Media Count : 16


Abstract : A method has been developed to determine the distribution of average spontaneous neuronal activity across the cerebral cortex from measurements of the field pattern across the human scalp. Computations of the mean short-term power, as well as the covariance between pairs of sensors, provide sufficient information to obtain a best estimate for the distribution of mean short-term image current power, as well as the covariance of image current between different locations on cerebral cortex. This method has applications for determining the spatial locations of alpha power suppression as regions of cortex participate in sensory or cognitive functions.... Magnetic source imaging, MSI, Alpha rhythm, Magnetic inverse problem, Spontaneous brain activity.


Descriptors :   *MAGNETIC FIELDS , *BRAIN , *CEREBRAL CORTEX , MEASUREMENT , COGNITION , ESTIMATES , IMAGES , PATTERNS , MEAN , SUPPRESSION , COVARIANCE , LEAST SQUARES METHOD , INCOHERENCE , REGIONS , HUMANS , COMPUTATIONS


Subject Categories : Anatomy and Physiology


Distribution Statement : APPROVED FOR PUBLIC RELEASE