Thalamic low threshold calcium current in a genetic model of absence epilepsy

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Abstract
The low threshold calcium current (IT) in thalamo-cortical neurones contributes to the generation of spike and wave discharges (SWDs) characteristic of generalized, non-convulsive absence epilepsy. The biophysical properties of this current were analysed in dorsal lateral geniculate neurones from the Genetic Absence Epilepsy Rats from Strasbourg (GAERS+). No difference was found in the voltage dependence and kinetics of IT between GAERS+ and rats of the non epileptic control strain (GAERS-). Thus, a dysfunction of IT does not appear to underlie the occurrence of SWDs in absence epilepsy.

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