the effect of caudate nucleus ( cn ) -injections of the glutamate agonist dl-alpha-amino-3-hydroxy-5-methyl-isoxazole-4-propionic acid ( ampa ) , viz . an agonist of quisqualate receptors , on switching behaviour was investigated : first , cats had to switch from hanging with the forepaws on the bar to climbing on the bar ;
C0022266
isoxazole
C0051318
ampa