Efferent connections from the brain to the frontal organ in Rana temporaria demonstrated by labeling with horseradish peroxidase.

After injection of horseradish peroxidase into the frontal organ of Rana temporaria, labeled perikarya were found in the medial part of the amygdala, the preoptic area, the nucleus rotundus, the pretectal area, and the lateral parts of the midbrain central griseum.