Effects of Minaprine and Sulpiride Injected into the Amygdaloid Nucleus on the Duration of Immobility in Rats Forced to Swim

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Abstract
We examined the effects of minaprine and sulpiride injected into the medial amygdaloid nucleus on the duration of immobility in rats forced to swim. Minaprine (50 .mu.g/.mu.l) significantly reduced the duration of immobility, while sulpiride (50 .mu.g/.mu.l) remarkedly enhanced it. These results suggest that the medial amygdaloid nucleus might be involved in the suppressive effect of minaprine on the duration of immobility, as was seen with the tricyclic antidepressants. The pattern of behavior seen with sulpiride administrations differed considerably from that seen with the tricyclic antidepressants.