Alterations in physiological functions and in brain monoamine content in the sympathectomized rats.

L. S. Lin, W. T. Chiu, M. T. Lin, C. J. Shih

Research output: Contribution to journalArticle


In the present study, we conducted pre-ganglionic decentralization (or sympathetic trunk resection) of the superior cervical ganglia and observed alterations in several physiological functions and in the monoamine content of different brain regions. Over an ambient temperature range of 8-30 degrees C, these sympathectomized rats maintained their rectal temperatures within a normal limit displayed by the intact controls. These sympathectomized animals, although showing no change in the level of spontaneous pain threshold or motor activity, did display an increased sensitivity of analgesic responses to morphine administration or locomotor stimulant responses to amphetamine administration. Biochemical examination revealed that these sympathectomized animals had a higher level of norepinephrine, dopamine or 5-hydroxytryptamine in the hypothalamus, as well as a higher level of dopamine in the corpus striatum. However, in the brainstem, these sympathectomized animals had a unaltered monoamine level. The data indicate that, in a sympathectomized condition, changes in the monoamine content of different brain regions may be correlated with the above-mentioned alterations in somatosensory and motor neural functions.

Original languageEnglish
Pages (from-to)191-195
Number of pages5
JournalProceedings of the National Science Council, Republic of China. Part B, Life sciences
Issue number3
Publication statusPublished - Jul 1986
Externally publishedYes


ASJC Scopus subject areas

  • Medicine(all)

Cite this