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政大機構典藏 > 理學院 > 心理學系 > 期刊論文 > Item 140.119/20792

Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/20792

Title:	Influences on water intake in the rat after lesion of the septal subareas
Authors:	廖瑞銘;葉純卿 Liao,Ruey-ming
Date:	2000-01
Issue Date:	2008-12-31 10:52:30 (UTC+8)
Abstract:	It has been suggested that the septum plays an inhibitory role in the behavioral function. Recent work has shown that the septum is heterogeneous from the neuroanatomical perspective. The present study examined the water intake of rats lesioned with kainic acid (0.5 microg/0.5 microl/site) on three septal subregions: anterior medial (MSa), posterior medial (MSp), and lateral (LS) sites. Drinking volume was enhanced mostly in rats with the MSp lesion, and so was locomotor activity. However, these two measures were not significantly correlated. This polydipsia induced by MSp lesion was also found in a chronic domain. Another experiment further determined the dipsogenic effects of polyethylene glycol (PEG; 20%) and hypertonic saline (1 M NaCl) in MSp lesioned rats. Water intake increased significantly after administration of the hypertonic saline treatment, but not after injection of PEG. However, this disparity approached a nonsignificant level 8 hr after thirst challenges were conducted. In addition to revealing septal hyperdipsia. these data suggest that the septal subareas can be functionally heterogeneous in drinking behavior. The dipsogenic response profiles for the cellular and extracellular thirst challenges could be differentially affected by kainate lesion in the MSp.
Relation:	Proceedings of the National Science Council (Part B：Life Science), 24(1), 26-32
Data Type:	article
Appears in Collections:	[心理學系] 期刊論文

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