条件瞬目反応による他覚的嗅覚検査法

AN OBJECTIVE TEST OF THE SENSE OF SMELL BY MEANS OF CONDITIONAL REFLEX EYE-WINKING

　Ⅰ．緒言

　われわれは従来から他覚的嗅覚検査について一連の研究を行なつており，脳波，GSR, CGSRなどによる方法に続いてすでに嗅刺激を無条件刺激とする方法を発表してきたが，今回は嗅刺激を条件刺激とするPavlov型条件反射を用いる方法について条件形成法の検討を行ない，さらに実際の嗅覚検査における応用価値の検討とを行なつたので報告する。

　Basing upon the Pavlov's law of conditional reflex and by utilizing the eye winking reflex, a study is made to find a means by which the sense of smell might be recorded objectively. The stimulation evoking the sense of smell was regarded as a conditional and that for the light as non-conditional.

　The winking-movements of the eye-lid were recorded by means of ENG apparatus.

　For elicitation of non-conditional reflex the instantaneous light supply was sought from the stroboscope. For conditional reflex of the sense of smell the source of irritant was increased by 50%.

　A very little difference was noted in the results of the objective and subjective test in the sense of smell; the test on the threshold value of these two methods were both satisfactory.