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논문 기본 정보

자료유형
학술저널
저자정보
Hong, Seung-Kil (Derpartments of physiology, College of Medicine, Korea University) Nahm, Sook-Hyun (Derpartments of Physiology, College of Medicine, Korea University) Han, Hee-Chul (Derpartments of physiology, College of Medicine, Korea University) Suh, Young-Suk (Derpartments of Anatomy, College of Medicine, Korea University) Won, Ran (Derpartments of Physiology, College of Medicine, Korea University) Lee, Bae-Hwan (Derpartments of Physiology, College of Medicine, Korea University)
저널정보
대한생리학회 대한생리학회지 대한생리학회지 제25권 제1호
발행연도
1991.1
수록면
87 - 99 (13page)

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초록· 키워드

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In order to elucidate whether capsaicin applied topically acts as a pain-producing subastance or as a tastant, neuronal activities of the chorda tympani nerve(CN), lingual nerve(LN), solitary tract nucleus(STN), and trigeminal nucleus(TGN) were recorded while thermal and taste stimuli, and capsaicin were being applied topically, and algesics intra-arterially to the tongue of cats anesthetized with ${\alpha}-chloralsoe$. In addition, the STN neurons were examined after wheat germ agglutinin-horseradish peroxidase(WGA-HRP) was applied to the CN. The CN fibers responded to taste and thermal stimuli, algesics, and capsaicin. Responses to capsaicin were significantly correlated with those to taste and thermal stimuli. The LN fibers mainly responded to mechanical and thermal stimuli, algesics, and capsaicin. Responses to capsaicin were significantly correlated with those to algesics. The STN neurons responded to taste and thermal stiumli, algesics, and capsaicin. Responses to capsaicin were significantly correlated with those to taste and thermal stiumli in somewhat different fashion from those of the CN fibers. The TGN neurons mainly responded to mechanical stimuli, algesics, and capsaicin. Correlations between responses to capsaicin and any others were not significant. After WGA-HRP was applied to the CN, the STN neurons which receive input from the CN were identified largely in the medio-ventral portion to the solitary tract. These results suggest that capsaicin produce taste as well as pain sensation. Sensory information evoked by capsaicin can be conveyed to the STN, especially medio-ventral portion, via the CN as gustatory information on the one hand, and to the STN or TGN via the LN as noxious information on the other. In addiation, the noxious information may be conveyed to the STN via the CN.

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