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題 名 | Influences on Water Intake in the Rat after Lesions of the Septal Subareas=大鼠喝水行為受中膈神經核破壞的影響 |
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作 者 | 廖瑞銘; 葉純卿; | 書刊名 | Proceedings of the National Science Council : Part B, Life Science |
卷 期 | 24:1 2000.01[民89.01] |
頁 次 | 頁26-32 |
分類號 | 415.149 |
關鍵詞 | 喝水行為; 中膈神經核; 高張鹽水; 乙烯乙二醇; Drinking behavior; Septum; Kainic acid; Polyethylene glycol; Hypertonic saline; |
語 文 | 英文(English) |
英文摘要 | 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?/0.5?/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 (1M 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. |
本系統中英文摘要資訊取自各篇刊載內容。