کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4330307 1614251 2008 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
McGurk effects in cochlear-implanted deaf subjects
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
McGurk effects in cochlear-implanted deaf subjects
چکیده انگلیسی

Cochlear implants are neuroprostheses designed to restore speech perception in case of profound bilateral hearing loss. As speech is fundamentally an audiovisual percept, a deficit in processing auditory information might lead to changes in audiovisual integration of speech comprehension. Using vowel–consonant–vowel stimuli under unimodal, audiovisual congruent and audiovisual incongruent (McGurk) conditions, we tested postlingually deaf cochlear-implanted (CI) users and normally hearing (NH) subjects in order to investigate their audiovisual perceptive strategies. Mode/Place-of-articulation perceptive analysis and information transmission analysis of congruent and incongruent percepts indicated a similar sensory specialization for CI users when compared to NH subjects, with voicing and nasality cues transmitted via audition and place cues principally transmitted via vision. NH as well as CI subjects underwent typical McGurk illusory percepts. However, while normally hearing subjects show a well-balanced bimodal integration of incongruent speech, we demonstrated that cochlear implantees present a bias toward a visual-predominant bimodal integration. Our results are complementary to previous studies showing that CI users maintain a high level of speechreading, even after several years of recovery of auditory speech comprehension. Altogether, our results suggest a cross-modal reorganization of speech comprehension in cochlear-implanted patients that might recruit more strongly than in NH the visual and visuo-auditory brain areas involved in speechreading.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Brain Research - Volume 1188, 10 January 2008, Pages 87–99
نویسندگان
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