Apamin ( 10 ng ) had a tendency to decrease the convulsive threshold ( 21.6 +/- 2.2 to 19.9 +/- 2.5 mg. l ( -1 ) ) but this was not statistically significant .
B-ChemicalEntity O O O O O O O O O O B-DiseaseOrPhenotypicFeature O O O O O O O O O O O O O O O O O O O O O O