A direct ventral connection between the bed nucleus of the stria terminalis and the amygdaloid complex in the monkey (Macaca fascicularis).

A direct ventral connection, between the bed nucleus of the stria terminalis and the amygdaloid complex in the monkey is described. It consists of bundles of extremely fine unmyelinated axons of a median diameter between 0.16 and 0.2 micrometer. The total number of axons is estimated at over 500,000. Using observations gained by other authors it is deduced, that the direction of conduction is probably from the bed nucleus of the stria terminalis to the amygdala. Other observations in the literature indicate, that the pathway may be concerned with the regulation of ovulation.