SourceNeuroscience Letters, 338, 3, (2003), pp. 177-180
Article / Letter to editor
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SW OZ DCC SMN
SW OZ NICI BI
The antiepileptic drug vigabatrin increases GABA concentrations by inhibiting GABA transaminase. The effects of vigabatrin on type 11 spike wave discharges (SWDs) in the electroencephalogram of ACI rats were studied in order to learn more about the effects of altering GABA concentration on SWDs. The incidence of type II SWDs increased after vigabatrin (60/h) as compared to saline treatment (3.7/h). This effect appeared with a halftime of 100 min. The duration of type II SWDs increased after vigabatrin (1.52 s) as compared to saline treatment (1.04 s), but the peak-frequency of the type 11 SWDs decreased after vigabatrin (5.6 Hz) as compared to saline treatment (7.5 Hz). Thus, vigabatrin alters the type II SWD morphology. These results are in agreement with predictions of Destexhe's theoretical model, modulating both GABA(A) and GABA(B) conductances.
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