12
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      McGurk effects in cochlear-implanted deaf subjects.

      Brain Research
      Acoustic Stimulation, Adult, Cerebral Cortex, physiology, Cochlear Implants, Cues, Deafness, physiopathology, therapy, Female, Humans, Illusions, Language Tests, Male, Middle Aged, Neural Pathways, anatomy & histology, Neuronal Plasticity, Photic Stimulation, Reading, Recovery of Function, Speech Perception, Visual Perception

      Read this article at

      ScienceOpenPublisherPubMed
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          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.

          Related collections

          Author and article information

          Comments

          Comment on this article