The site of origin of a direct projection from the amygdala to autonomic regulatory nuclei in the dorsomedial medulla has been precisely localized and delimited in the rabbit by means of the retrograde axonal transport of horseradish peroxidase. Labeled cells in the amygdala were found to be confined within regions of the ipsilateral central nucleus. Many labeled cells were also observed to extend beyond the central nucleus into closely related regions of the substantia innominata and bed nucleus of the stria terminalis.