[An analysis of the dipole characteristics of the evoked potentials of the cerebral cortex].
Possibility is studied of application of the current dipole in uniform unlimited medium for description of the sources of the evoked potentials recorded epidurally and on the skull surface. By means of computing experiment the influence is analyzed of per-layer heterogeneity of skull and scalp conductivity on precision of the solution of the inverse problem of electroencephalography with the use of the above model. It is shown that at epidural focal recording of the potential, the application of the model is adequate, and at extracranial recording introduction of additional corrections is required. The results of the analysis are used for the description of the change of parameters values of the sources of individual primary response of the cat visual cortex to electric stimulation of the local region of the lateral geniculate body, what allows to specify the characteristics of possible sources of the primary evoked electrical activity of the cerebral cortex.
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D000818:Animals; D002415:Cats; D002540:Cerebral Cortex / Q000502:physiology*; D003198:Computer Simulation; D004553:Electric Conductivity; D004558:Electric Stimulation; D004567:Electrodes, Implanted; D005071:Evoked Potentials / Q000502:physiology; D008722:Methods; D008959:Models, Neurological
Analiz dipol'nykh kharakteristik vyzvannykh potentsialov kory golovnogo mozga.