to examine the biochemical events associated with the retrograde reaction in central noradrenergic neurons , changes in the activities of several enzymes subserving the metabolism of catecholamines , including tyrosine hydroxylase ( th ) , dopamine-beta-hydroxylase ( dbh ) , dopa decarboxylase ( ddc ) , and monoamine oxidase ( mao ) , were measured in the nucleus locus coeruleus of rat brain following transection of the ascending axons from neurons in this nucleus by electrolytic lesions of the posterolateral hypothalamus .
C0004461
axons
C0027882
neurons