Hyun Joon Shim

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PURPOSE Hearing loss can lead to a number of disabilities and can reduce quality of life. Noise-induced hearing losses have become more common among adolescents due to increased exposure to personal music players. We, therefore, investigated the use of personal music player among Korean adolescents and the relationship between hearing threshold and usage(More)
OBJECTIVES/HYPOTHESIS Because in most cases the development of tinnitus is triggered by cochlear damage, there exists the opportunity to eliminate tinnitus while the cochlear lesion is still reversible. Therefore, we evaluated the therapeutic effects of various treatment modalities on acute subjective idiopathic tinnitus (SIT) and investigated prognostic(More)
CONCLUSIONS Ramsay Hunt syndrome (RHS) with multiple involvement of cranial nerves is more severe and intractable than RHS without such involvement. OBJECTIVES Typically, RHS involves VII and VIII nerves and unilaterally, and RHS accompanied by multiple cranial neuropathy is very rare. We describe 11 patients who developed RHS with multicranial nerve(More)
OBJECTIVES To compare tinnitus patients who have normal hearing between 250 Hz and 8 kHz with normal controls with regard to the ability of each group to hear extended high-frequency pure tone thresholds. METHODS We enrolled 18 tinnitus patients, each of whom had a threshold of HL <25 dB and threshold differences of <10 dB between ears at frequencies of(More)
UNLABELLED Although cochlear damage is believed to trigger the perception of tinnitus in the central auditory system, its pathophysiological mechanism is still unclear. We aimed to investigate the pathophysiology of tinnitus using psychoacoustic assessments of auditory spectral and temporal resolution and speech perception in noise. Human subjects with(More)
OBJECTIVE To classify the inner ear anomalies of cochlear implantees with profound sensorineural hearing loss. STUDY DESIGN Retrospective case review. SETTING Tertiary referral center. PATIENTS For the normative data of the inner ear structures, the temporal bone computed tomography of 60 patients (120 ears) with normal bone-conduction threshold (< 15(More)
CONCLUSION The early post-exposure treatment with All-trans retinoic acid (ATRA) can reduce hair cell loss and hearing deterioration in mice in which permanent threshold shift has been induced. OBJECTIVE One of the mechanism by which intense noise induces apoptosis of cochlea hair cells is the C-Jun NH(2)-terminal kinase (JNK) pathway. ATRA is a potent(More)
OBJECTIVES In the present study, we investigated whether speech-related cognitive function and speech recognition ability under background noise in adults with hearing impairment are improved with the use of hearing aids. METHODS Participants were recruited from the ENT Department of Eulji Hospital from September 2008 to July 2009. The study group(More)
OBJECTIVES To evaluate that the cross-sectional area of the air space in the Eustachian tube (ET) on computed tomography (CT) images could be useful for predicting the postoperative aeration of the middle ear. METHODS The patient group consisted of 80 patients (80 ears) with chronic otitis media and who underwent middle ear surgery from 2006-2007 and who(More)
OBJECTIVE The role of allergy in the pathophysiology of otitis media with effusion (OME) remains unclear. We evaluated the role of allergy and the Th1/Th2 balance in OME patients. METHOD Middle ear fluid was collected from 46 OME patients who had a ventilating tube inserted, and expression of GATA3, T-bet, IL-4, and IFN-gamma mRNA was assessed by RT-PCR.(More)