Abstract
Restraint stress increased the number of neurons with Fos immunoreactivity in the medial amygdaloid nucleus in rats and caused an increase in blood pressure. The stress-induced pressor response was inhibited by muscimol (80 pmol), a neuroinhibitory compound, injected bilaterally into the medial amygdaloid area, whereas muscimol (8 pmol) similarly injected had only a tendency of inhibition of the pressor response. These data suggest that the medial amygdaloid nucleus is involved in mediation of the restraint stress-induced pressor response.
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