Differences in transmission through the dorsal column nuclei in spontaneously hypertensive and Wistar Kyoto rats

James T. Garsik, Walter C. Low, David Whitehorn

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Abstract

The medial lemniscal evoked potential in response to a range of footshock intensities was recorded in spontaneously hypertensive (SHR) and Wistar Kyoto rats (WKY). Input-output (I-O) relationships were constructed as the percent of maximum response at each intensity. The SHR had a steeper I-O relationship than did the WKY. This difference was also evident when SHR maintained normotensive from weaning with hydralazine were compared with identically treated WKY. The treatment itself steepened the I-O relationship of the SHR while leaving that of the WKY unchanged. These results indicate an inherent hyperresponsiveness in the SHR dorsal column nuclei and an inhibitory effect of elevated blood pressure on transmission through these nuclei.

Original languageEnglish (US)
Pages (from-to)188-192
Number of pages5
JournalBrain Research
Volume271
Issue number1
DOIs
StatePublished - Jul 18 1983

Bibliographical note

Funding Information:
Supported by HL24110 (D.W.), Vermont Heart Association Grant in Aid (D.W.) and HL06339 (W.C.L.).

Keywords

  • medial lemniscus
  • sensory modulation
  • spontaneously hypertensive rat

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