using a modified cobalt-glucose oxidase-diaminobenzidine ( co-god ) method in a combination of horseradish peroxidase ( hrp ) retrograde tracing and immunohistochemistry , a widespread localization of corticotropin releasing factor-like immunoreactive ( crfi ) structures in the rat inferior colliculus ( ic ) , and a crfi-containing pathway from the subthalamus and the hypothalamus to the ic have been observed .
C0010132
crfi
C0020663
hypothalamus