in urethane-anaesthetized hexamethonium-pretreated rats , intravenous gaba produced a set of 'excitatory ' cardiovascular effects ( increase in heart rate , force of contraction and blood pressure ) which were mimicked by intravenous muscimol but not by intravenous baclofen , and were antagonized by pretreatment with bicuculline .
C0016904
gaba
C0004609
baclofen