Byung-Hoon Ahn

Learn More
Occupational exposure limits (OELs) for irritant dusts have had no quantifiable bases. This study (1) charted chemosensory feel, denoted chemesthesis here, to dusts of calcium oxide (1 to 5 mg/m(3)), sodium tetraborate pentahydrate [sodium borate] (5 to 40 mg/m(3)), and calcium sulfate (10 to 40 mg/m(3)); (2) examined correlates of the chemesthetic(More)
In Experiment 1, subjects sought to localize the nostril stimulated, left or right, in tests with nine esters (acetates, propionates, and butyrates) at concentrations meant to trigger chemesthesis (pungency, irritation). The task produced psychometric functions for chemesthetic detection unconfounded by olfactory sensations. The functions indicated a sharp(More)
Human respiratory syncytial virus (HRSV) is the most common respiratory pathogen among infants and young children. To investigate the prevalence and genetic characteristics of HRSVs circulating in South Korea, we analyzed medical records of patients and performed molecular analysis of the G-protein gene of viruses detected from nasopharyngeal aspirates(More)
Sudden deafness without associated neurological symptoms and signs is typically attributed to a viral inflammation of the labyrinth. Although sudden deafness occurs with anterior inferior cerebellar artery (AICA) infarction, the deafness is usually associated with other brainstem or cerebellum signs such as crossed sensory loss, lateral gaze palsy, facial(More)
BACKGROUND There has been no systematic study that carefully investigates the characteristic features of abnormal cervical vestibular-evoked myogenic potential (cVEMP) response associated with the AICA territory infarction. OBJECTIVES To investigate the frequency, the characteristic patterns of abnormal cVEMP associated with AICA territory infarction, and(More)
Sudden deafness without associated neurological signs and symptoms is typically attributed to a viral inflammation of the labyrinth. Sudden deafness as a heralding manifestation of basilar occlusion has rarely been described. A 60-year-old male with hypertension presented with an acute onset of isolated sudden deafness with vertigo. On admission, initial(More)
Many neurologists are unaware of the drop attack that may occur from an inner ear dysfunction especially in elderly. We studied the clinical features and results of quantitative audiovestibular tests in six elderly patients (> or =65 years of age) who presented with drop attacks attributable to an inner ear pathology. Group was divided into Meniere's(More)
Berberine, an isoquinoline alkaloid with a long history of use in Chinese medicine, has several important pharmacological effects. Several studies have revealed that berberine has neuroprotective and neuropsychiatric effects. However, there are few reports regarding the protective effect of berberine against neuronal damage following transient global(More)
OBJECTIVE Fungi are known to induce the production of chemical mediators from respiratory epithelial cells and have been increasingly recognized as important pathogens in sinusitis. However, the exact role of fungi in the pathogenesis of rhinosinusitis has not been clearly established. This study was performed to improve our understanding of the role of(More)
BACKGROUND Allergic rhinitis (AR) is often accompanied by multiple ocular symptoms. This study aimed to evaluate the prevalence of ocular symptoms and the impact of ocular symptoms on the quality of life in patients with AR. METHODS One thousand one hundred seventy-four patients with AR were enrolled from 24 centers in Korea. They were classified into(More)
  • 1