Taro Inagaki

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OBJECTIVE To investigate the vestibular system changes in sudden deafness with vertigo (SDwV) and sudden deafness without vertigo (SDwoV) and the cause of persistent canal paresis (CP) in SDwV patients. STUDY DESIGN Retrospective study. MATERIALS AND METHODS Four temporal bones from the affected ear in 4 patients with unilateral sudden deafness (SD), 2(More)
OBJECTIVE To determine the subjective visual vertical (SVV) perception in patients with vestibular neuritis (VN) and sudden sensorineural hearing loss (SSHL) using the SVV test and other neuro-otological examinations, namely, the vestibular evoked myogenic potential (VEMP) and caloric tests, and to clarify which vestibular nerve function is associated with(More)
CONCLUSION The cupula shows various degrees of changes after gentamicin (GM) injection into the inner ear, with or without damage of the sensory cells. This cupula change may be a part of the etiology of peripheral vertigo, and is also potentially one of the mechanisms of reduced caloric response. OBJECTIVES To observe the morphological changes of the(More)
OBJECTIVES To assess the clinicopathologic correlations of otologic complaints in patients with acute lymphocytic leukemia. DESIGN Otologic complaints and histologic findings were evaluated in 25 temporal bones of 13 acute lymphocytic leukemia patients. RESULTS Nine patients had a history of otologic complaints, including hearing loss, otalgia,(More)
CONCLUSION Postural restrictions are probably not necessary after the canalith repositioning procedure (CRP). OBJECTIVES Epley reported the effect of CRP for benign paroxysmal positional vertigo (BPPV). After CRP, patients are often requested to restrict postural change. However, some studies suggested that CRP may work without postural restrictions. The(More)
OBJECTIVES This study was aimed to experimentally investigate the effect of returned otoconia on the utricular using isolated utricles. The effect of interposed otoconia in models of canalolithiasis and cupulolithiasis were also investigated using isolated posterior semicircular canal (PSC). METHODS Bullfrogs were used. The utricles (Experiment I) and PSC(More)
CONCLUSION Dysequilibrium is one of the most important side effects of ear surgery. The subjective visual vertical can be used as a good indicator for the evaluation of otolithic function in patients with ear surgery. OBJECTIVE To investigate the influence of various types of ear surgery on the otolithic organs. METHODS Seventy-one patients underwent(More)
CONCLUSION With half-sized cupula, the semicircular canal nerve potentials decreased under slow stimulus, thus potentially leading to reduced caloric response. This also suggests that shrunken cupula may cause dizziness because of its hypermobility. OBJECTIVES To examine the physiological effect of half-sized cupula on the semicircular canal nerve(More)
CONCLUSION Various changes were observed in the cupula, including shrinkage and enlarged volume, following the disruption of the membranous labyrinth. Cupular change after membranous labyrinth disruption may be a pathology of vestibular disorders. OBJECTIVES To observe the morphological changes of the cupula after disruption of the membranous labyrinth(More)