Taro Inagaki

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OBJECTIVE To evaluate the maturity of the peripheral vestibular system in Down syndrome by examining the number of Scarpa's ganglion cells and the density of vestibular hair cells. STUDY DESIGN Case-control study using human temporal bones. SETTING Tertiary academic center, otopathology laboratory. SUBJECTS AND METHODS Sixteen temporal bones from 8(More)
We report the clinical features of 4 cases with positional or positioning down-beating nystagmus in a head-hanging or supine position without any obvious central nervous system disorder. The 4 cases had some findings in common. There were no abnormal findings on neurological tests or brain MRI. They did not have gaze nystagmus. Their nystagmus was observed(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)
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)
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 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)
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 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 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 Patients with vestibular neuritis (VN) with complete canal paresis (CP) showed a higher rate of abnormal ocular vestibular evoked myogenic potential (oVEMP) than those with partial CP. From these results, it is speculated that the superior vestibular nerve function mainly affects oVEMP. Significant correlation was found between the grades of the(More)