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  • Title: Evaluation of the monothermal caloric test.
    Author: Bhansali SA, Stockwell CW, Bojrab DI, Schwan SA.
    Journal: Laryngoscope; 1989 May; 99(5):500-4. PubMed ID: 2785236.
    Abstract:
    In 1970, Torok reported that patients with labyrinthine disease showed vestibular recruitment and that patients with retrolabyrinthine disease showed vestibular decruitment on the monothermal caloric test. Other investigators have failed to confirm these findings; however, their studies did not precisely replicate Torok's test procedure. Following Torok's procedure exactly, the monothermal caloric test was administered to normal individuals and to patients with well-documented vestibular lesions. Nine of ten normal persons showed normal responses and one person showed borderline decruitment. Six of eight patients who had lesions of the vestibular nerve or central vestibular pathways showed decruitment. Two patients with active Meniere's disease showed recruitment and one showed asymmetry. Two patients with Meniere's disease who had undergone endolymphatic sac operations showed normal responses. These findings support Torok's claim that the monothermal caloric test discriminates between labyrinthine and retrolabyrinthine vestibular pathology.
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