After a short period of basal activity recording , epileptic focus was induced by injecting 400IU/2 microl penicillin-G potassium into the left lateral ventricle while the cortical activity was continuously recorded .
O O O O O O O O O B-DiseaseOrPhenotypicFeature O O O O O O O B-ChemicalEntity I-ChemicalEntity O O O O O O O O O O O O O