Olfactory pathway evoked potentials in response to hypothalamic stimulation.
Ipsilateral and contralateral stimulation of lateral, ventromedial and posterior hypothalamic nuclei produced evoked responses in the olfactory bulb and in the prepyriform cortex. No differences in the latencies were found by stimulation of each nucleus in the homo and contralateral olfactory structures. The high amplitude of the fast component (N1) was obtained with stimuli applied to the ventral zones and the slow components (N2, N3) were obtained with more dorsal stimulation. An ipsilateral pathway is indicated at the supramammillary and posterior commissure level, since severing these structures abolishes the evoked responses. A bilateral projection is proposed for the olfactory bulb.
D000818:Animals; D002415:Cats; D004558:Electric Stimulation; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D007031:Hypothalamus / Q000502:physiology*; D008297:Male; D009830:Olfactory Bulb / Q000502:physiology; D009833:Olfactory Pathways / Q000502:physiology*