Inference of a stable dispersion relation for electrocortical activity controlled by the lateral hypothalamus.
A second test is undertaken for a theory of linear wave motion in electrocortical waves, under lateral hypothalamic control via regulation of damping. This test invokes a general property of linear systems, namely that wave motion with characteristic natural frequencies implies fixed phase velocities associated with each wavelength, independent of the changes in hypothalamic input. A means of testing the invariance of this dispersion relation at the point of recording is derived from a simplified biophysical model for waves in a dipole layer. The method avoids some problems implicit in direct spatio-temporal wave analysis. Results confirm that the model under test is internally consistent, and is also consistent with other findings concerning the origin and spatial nature of the EEG.
D000818:Animals; D002540:Cerebral Cortex / Q000502:physiology*; D004553:Electric Conductivity; D004569:Electroencephalography; D007026:Hypothalamic Area, Lateral / Q000502:physiology*; D008297:Male; D008433:Mathematics; D008959:Models, Neurological; D051381:Rats; D011919:Rats, Inbred Strains