Abstract

Long and short trains of electrical stimulation at low and high pulse frequencies were delivered to diencephalic sites in the rabbit. Short train durations elicited BP increases accompanied by HR decreases at all sites, whereas long train durations elicited a variety of different BP and HR changes at different electrode sites. Fifty and 200 Hz pulse frequencies elicited significantly more pressor responses than did 5 Hz pulse frequency, which tended to convert pressor responses elicited by higher frequencies to depressor responses.

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