The effects of Bicuculline on the P3a could be reversed with microinfusion of GABA,but the P3a was not markedly affected by Bicuculline in Acg II.

• 但只在AcgI区Bicuculline除使P3a波潜伏期显著延长、波幅降低外 (P <0 .；0 1)；甚至可使P3a波消失；外源性GABA使P3a波复现。