Abstract：
:Systemic injections of the dopamine antagonist haloperidol (0.1-2.5 mg/kg) induced a dose dependent increase in Fos-like immunoreactivity (FLI) in the internal segment of the globus pallidus (GPi) and in the substantia nigra (SN) of cynomolgus monkeys. These findings are consistent with models of basal ganglia organization which predict that blockade of dopamine receptors should result in a disinhibition of cells in these structures. In the GPi, labeling was most pronounced along the ventral, lateral and medial borders of the nucleus and none of the pallidal cells expressing FLI were immunopositive for choline acetyltransferase. In the SN, immunoreactive nuclei were concentrated in the pars reticulata and the majority of labeled nigral neurons did not display tyrosine hydroxylase-like immunoreactivity. A small number of cells displaying FLI were also observed in the external pallidal segment, but no labeling was seen in the subthalamic nucleus. These findings indicate that blockade of dopamine receptors induces a characteristic pattern of Fos expression in the primate brain which strongly resembles that previously reported in rodents.
journal_name
Brain Resjournal_title
Brain researchauthors
Wirtshafter D,Asin KEdoi
10.1016/s0006-8993(99)01550-4subject
Has Abstractpub_date
1999-07-24 00:00:00pages
154-61issue
2eissn
0006-8993issn
1872-6240pii
S0006-8993(99)01550-4journal_volume
835pub_type
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