The interpeduncular nucleus.
D000818:Animals; D001522:Behavior, Animal / Q000502:physiology; D002799:Cholinergic Fibers / Q000378:metabolism; D008636:Mesencephalon / Q000033:anatomy & histology / Q000378:metabolism / Q000502:physiology*; D009434:Neural Pathways; D018377:Neurotransmitter Agents / Q000378:metabolism; D012726:Sexual Behavior, Animal / Q000502:physiology; D013045:Species Specificity; D013373:Substance P / Q000378:metabolism; D013569:Synapses / Q000648:ultrastructure; D005680:gamma-Aminobutyric Acid / Q000378:metabolism
D018377:Neurotransmitter Agents; D013373:Substance P; D005680:gamma-Aminobutyric Acid