Adrenoceptor antagonists reduce sIPSC frequency: data from mechanically dissociated neurons. A1 - B1, sample traces of sIPSCs, showing that sIPSC frequency decreased in the presence of prazosin (PRAZ, 10 μM, A1), an antagonist of α1-adrenoceptor or butoxamine (BUTO, 2 μM, B1), an antagonist of β2- adrenoceptor. A2 - B2, cumulative probability plots of interevent intervals between successive sIPSCs before and during the application of PRAZ (A2) or BUTO (B2). The insets summarized PRAZ (A2) or BUTO (B2) induced inhibition of sIPSC frequency from 5 neurons. ** p < 0.01, A2, control vs. PRAZ, B2, control vs. BUTO.