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近些年來積累了許多重要的材料,並可做出某些結論。在我們的臨床經驗中,我們曾利用了各種藥物學製劑作爲無條件刺激物如;Cordiamin,Caffeine,Lobelin水化氯醛及水楊酸钠。每一種藥物經過數天後都用無作用的物質來代替。在我們觀察過的大部份經驗中,用生理溶液替換葯物時,在某些時期中它仍然保持著以前所服用的物質之作用。例如:給患者皮下注射腎上腺素(Adrenalim),八次以後,曾以生理液皮下注入而代替腎上腺素,患者對它的反應和對腎上腺素的反應是一樣的:增高了動脈壓和血液中的糖量。後來當改變了觀察方法的時候,條件反射性質的效力仍然完全存在着。
In recent years, many important materials have been accumulated and some conclusions can be drawn. In our clinical experience, we have used a variety of pharmacological agents as unconditioned stimulants such as Cordiamin, Caffeine, Lobelin hydrated chloral and sodium salicylate. After a few days, each drug is replaced by an inactive substance. In most of the experiences we’ve observed, when replacing a drug with a physiological solution, it still retains the substance it used to take for some periods. For example, adrenalim was administered subcutaneously to patients and, eight times later, they were injected subcutaneously in physiological fluids instead of epinephrine. The patient’s response to it was the same as for epinephrine: increased arterial pressure and blood Sugar amount. Later, when the observation method was changed, the validity of the conditioned reflex still existed completely.