頁籤選單縮合
題 名 | Pressor Effects Elicited from the Periaqueductal Grey, and dorsal and Ventrolateral medulla in Cats Are Independent from Cerebellar Mechanisms |
---|---|
作 者 | 蔡作雍; 顏克典; 陳甫州; 郭重雄; | 書刊名 | 中國生理學雜誌 |
卷 期 | 38:4 1995.12[民84.12] |
頁 次 | 頁255-261 |
分類號 | 383 |
關鍵詞 | Cerebellum; Dorsal medulla; Fastigial nucleus; Periaqueductal grey; Ventrolateral medulla; |
語 文 | 英文(English) |
英文摘要 | Cats were anesthetized with chloralose (35 mg/kg, i.p.) and urethane (350 mg/kg, i.p.). In 5 cates, the pressor regions of periaqueductal grey (PAG) of the midbrain were stimulated electrically (rectangular pluses, 80 Hz, 0.5ms. 100-150 μA). In another 6 cats, the pressor regions of both dorsal medulla (DM) and ventrolateral medulla (VLM) previously located by electrical stimulation in the same cat were stimulated by sodium glutamate (Glu, 0.25 M, 100nl). After control stimulation, the superior, middle and inferior cerebellar preduncles on both sides were transected while the stimulating electrodes were maintained in the same position. Changes of systemic arterial pressure (SAP) and plasma norepinephrine (NE) and epinephrine (EP) following stimulations of the PAG, DM or VLM were compared before and after transaction. It was found that the transaction did not cause significant changes in the resting SAP and plasma NE and EP and also the induced pressor responses, namely the increases of above parameters. Findings suggest that the sympathetic vasomotor effect and adrenomedullary secretion resulted from stimulations of both DM and VLM and possibly PAG are independent from the cerebellar mechanism. |
本系統中英文摘要資訊取自各篇刊載內容。