the possibility that the lesion non-specifically damaged striatal cells on which the agonists , but not the antagonists acted was excluded by results showing , firstly , that the increase in striatal ach elicited by the ach precursor , choline , was not blocked by decortication , and secondly , that the degeneration of the corticostriatal neurons did not prevent the ach-increasing effect of bromocriptine , a long-acting ergot alkaloid , when sufficient time was allowed for the drug to act .
C0006230
bromocriptine
C0014707
ergot alkaloid