1966 年 69 巻 3sup 号 p. 3-26
Since Dix, Hallpike, and Hood (1948), it has been widely believed that the recruitment phenomenon is not found in cases with retrocochlear hearing impairment. In fact, a number of investigators have reported that many cases with retrocochlear lesion do not show the recruitment phenomenon. But actually, a recruitment test, the author believes, has not been a conclusive cue in differential diagnosis in deafness due to cochlear and retrocochlear lesions. Though it is not usual, case with probable retrocochlear lesion sometimes shows the recruitment phenomenon and cochlear lesion sometimes does not.