title: Excitatory projection from the interpeduncular nucleus to central superior raphe neurons.
abstract: The projection from the interpeduncular nucleus (IP) to the central superior raphe nucleus (CS) was studied using electrophysiologic methods. IP stimulation generates monosynaptic EPSPs in a large number of CS neurons studied with latency of 1-2 ms. Intracellular peroxidase injections into CS neurons responding to IP shock confirmed the location and somatic origin of intracellular potentials. These findings document the existence of a direct excitatory projection from IP onto CS neurons.
mesh_terms: D000344:Afferent Pathways / Q000502:physiology; D000818:Animals; D001933:Brain Stem / Q000502:physiology*; D002415:Cats; D004558:Electric Stimulation; D005071:Evoked Potentials; D008473:Median Eminence / Q000502:physiology; D008636:Mesencephalon / Q000502:physiology*; D011903:Raphe Nuclei / Q000502:physiology*; D013569:Synapses / Q000502:physiology