THE STUDY OF SEX-DIFFERENCES IN ANTERIOR AND POSTERODORSAL SUBREGIONSOF THE MEDIAL NUCLEUS (NM) OF THE AMYGDALOID COMPLEX (AC) IN THE RAT-BRAIN - STEREOLOGICAL ANALYSIS

To determine the precise localization of sex differences in the subreg ions of the nucleus medialis (NM) of the amygdaloid complex (AC), morp hometric-stereological parameters (the volume density /Vv/ of cell nuc lei, of the cytoplasm, and neuropil and the numerical density /Nv/ of the anterior and posterior parts of NM) in adult male and female rats were used. There were no significant differences in the investigated v olume densities and numerical density of the anterior part of NM AC be tween male and female adult rats. Although, there were no significant differences in /Vv/ of cell nuclei and of cytoplasm, our investigation demonstrated that the posterodorsal subregion of NM of the rat showed sex differences in the volume density of the neuropil and in the nume rical density of cells. These values were significantly greater (p < 0 .05 and p < 0.001) in male than that in female posterodorsal subregion s of NM AC of adult rats.