B. Albowitz et U. Kuhnt, SPREAD OF EPILEPTIFORM POTENTIALS IN THE NEOCORTICAL SLICE - RECORDINGS WITH VOLTAGE-SENSITIVE DYES, Brain research, 631(2), 1993, pp. 329-333
The spread of epileptiform potentials in guinea pig neocortical slices
was investigated by use of voltage sensitive dyes and a fast optical
recording technique. Epileptiform activity was induced in a perfusion
medium containing 10-20 mu M bicuculline-methiodide and by single puls
e stimulation of layer I or the white matter. The location of minimal
and maximal amplitudes, the shape of the potentials at specific sites
and the velocity of spread were independent from the specific stimulat
ion site. The expression of epileptiform activity appeared to depend o
n specific, possibly geometrical, properties of the tissue.