these neurons were excited by 5-hydroxytryptamine [ the minimum effective concentration ( mec ) : 10 ( -5 ) -10 ( -4 ) m ] and histamine ( mec : 1-3 x 10 ( -4 ) m ) , and inhibited by dopamine ( mec : 1-3 x 10 ( -4 ) m ) , l-norepinephrine ( mec : 3 x 10 ( -4 ) -10 ( -3 ) m ) , l-epinephrine ( mec : 3 x 10 ( -4 ) m ) , gaba ( mec : 10 ( -5 ) -10 ( -4 ) ) , acetylcholine ( mec : 1-3 x 10 ( -4 ) m ) and its derivatives .
C0028351
l-norepinephrine
C0014563
epinephrine