کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9436574 1615696 2005 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Current-level discrimination using bipolar and monopolar electrode configurations in cochlear implants
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی سیستم های حسی
پیش نمایش صفحه اول مقاله
Current-level discrimination using bipolar and monopolar electrode configurations in cochlear implants
چکیده انگلیسی
This study examined current-level discrimination ability in listeners with cochlear implants using bipolar and monopolar electrode configurations. Current-level discrimination ability was measured as a function of electrode configuration (monopolar and bipolar), stimulation site (8 and 16) and level (5%, 15%, 25%, 50% and 80% of the dynamic range). Weber fractions usually decreased with increasing level. Differences in Weber fractions between monopolar and bipolar configurations were observed for listeners with short durations of deafness (<5 years). For these listeners, in the bipolar condition at the more-apical site 16, Weber fractions remained constant with increasing level, and the Weber fractions at low levels were smaller than in other conditions. We suggest that nerve density was better and the nerve-to-site-of-action-potential distance was smaller in these cases such that more fibers could be recruited with a unit increase in current level, leading to better current-level sensitivity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hearing Research - Volume 202, Issues 1–2, April 2005, Pages 170-179
نویسندگان
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