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Abnormal synchronous activation of the glutamatergic olivo-cerebellar pathway has been suggested to be crucial for the harmaline-induced tremor. The cerebellum receives two catecholaminergic pathways: the dopaminergic pathway arising from the ventral tegmental area/substantia nigra pars compacta, and the noradrenergic one from the locus coeruleus. The aim of the present study was to examine a contribution...
The present study shows that JNJ 16259685—a selective antagonist of glutamate metabotropic receptor subtype 1 (mGluR1) injected in doses of 0.16 and 0.32 mg/kg sc strongly enhances tremor of forelimbs, head and trunk, hypolocomotion, and ataxia induced by harmaline (7.5 mg/kg ip) in rats. JNJ 16259685 inhibited locomotor and exploratory activity per se. These results may suggest an inhibitory influence...
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