Imaging Regional Changes in the Spontaneous Activity of the Brain: An Extension of the Minimum-Norm Least-Squares Estimate
Manuscript rept. 1 Feb 1992-14 Feb 1993
NEW YORK UNIV NY
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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.
- Anatomy and Physiology