furthermore , interneurons which secrete excitatory amino acids and/or gaba may mediate the indirect effects of the catecholamines on afferent terminals because ( - ) baclofen and d.l-alpha-aminoadipate decrease , and picrotoxin and bicuculline increase , the dorsal root ( dr ) effects of e and ne .
C0007412
catecholamines
C0028351
ne