carbachol-induced rsa was reversibly blocked by a broad-spectrum excitatory amino acid antagonist ( kynurenic acid ) , but not by two selective n-methyl-d-aspartate ( nmda ) antagonists ( dl-2-amino-7-phosphonoheptanoic acid or dl-2-amino-5-phosphonovaleric acid ) , a gabaa antagonist ( bicuculline ) , or a gabab antagonist ( phaclofen ) , suggesting that carbachol-induced rsa involved primarily non-nmda excitatory amino acid , but not gabaergic , synapses .
C0002520
amino
C0243046
excitatory amino acid