Diazepam injection in globus pallidus attenuates the tremors induced by chlorpromazine and low dose of pentobarbitone in rats: A stereotaxic study

Abstract

We have described a tremor model induced by 3,5 mg/kg chlorpromazine and 20 mg/kg pentobarbitone administered intraperitoneally in guinea pigs (frequency: 24/sec) and left handed cats (frequency: 12/sec). In this study; we produced similar tremors in rats by the same dosages of chlorpromazine and pentobarbitone administration intraperitoneally (frequency: 16-22sec). Then we examined the effects of GABA'ergic diazepam 2 µg/µl, dopaminergic amantadine 10 mg/µl and anticholinergic atropine 20 µg/µl to the Nucleus Caudatus, Globus Pallidus and Lateral Posterior Thalamic Nucleus stereotaxically, in order to show any alteration on the tremor's amplitudes or frequency in this model. In this way, we discussed the validity of this model for Parkinsonian tremors. In 9 groups, we had significant responses in the Globus Palllidus-diazepam group only in the mean scores of amplitudes by paired test. In comparison with the control measurement, for 1. minute; p