ISSN:
1741-0444
Keywords:
Correlation
;
Visual evoked potential
;
Visual pathway
;
Weighting matrix
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
Notes:
Abstract Visual evoked potentials (VEPs) were measured using 19 electrodes attached to the scalps of five normal human subjects during stimulations of the full-field and hemifield chequerboard pattern reversal. These signals were analysed by a new method based on the time locus of the potential distribution centre, where this locus was computed from the spatial potential distribution using the weighting matrix and maximum mean cross-correlation criteria. The results showed that the loci of normal subjects are similar, with an average correlation of 0·87. The loci produced in the left hemifield stimulation were different from the loci produced during the right hemifield stimulation, with a correlation of −0·66. Experimental results from four cats showed significant changes of the time loci after surgical division of the visual path-ways.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02443931
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