Centre de Recherche en Neuropsychologie Expérimentale et Cognition, Université de Montréal Montréal, QC, Canada ; Département de Kinanthropologie, Université du Québec à Montréal Montréal, QC, Canada.
Centre de Recherche en Neuropsychologie Expérimentale et Cognition, Université de Montréal Montréal, QC, Canada ; Institut Raymond-Dewar, Centre de Recherche Interdisciplinaire en Réadaptation du Montréal Métropolitain Montréal, QC, Canada ; École d'Orthophonie et d'Audiologie, Faculté de Médecine, Université de Montréal Montréal, QC, Canada.
Front Hum Neurosci. 2014 May 22;8:316. doi: 10.3389/fnhum.2014.00316. eCollection 2014.
Recent results suggest that audiotactile interactions are disturbed in cochlear implant (CI) users. However, further exploration regarding the factors responsible for such abnormal sensory processing is still required. Considering the temporal nature of a previously used multisensory task, it remains unclear whether any aberrant results were caused by the specificity of the interaction studied or rather if it reflects an overall abnormal interaction. Moreover, although duration of experience with a CI has often been linked with the recovery of auditory functions, its impact on multisensory performance remains uncertain. In the present study, we used the parchment-skin illusion, a robust illustration of sound-biased perception of touch based on changes in auditory frequencies, to investigate the specificities of audiotactile interactions in CI users. Whereas individuals with relatively little experience with the CI performed similarly to the control group, experienced CI users showed a significantly greater illusory percept. The overall results suggest that despite being able to ignore auditory distractors in a temporal audiotactile task, CI users develop to become greatly influenced by auditory input in a spectral audiotactile task. When considered with the existing body of research, these results confirm that normal sensory interaction processing can be compromised in CI users.
最近的研究结果表明，人工耳蜗（CI）使用者的听觉-触觉相互作用受到干扰。然而，仍然需要进一步探索导致这种异常感觉处理的因素。考虑到先前使用的多感官任务的时间性质，目前尚不清楚任何异常结果是由所研究的交互作用的特异性引起的，还是反映了整体异常交互作用。此外，尽管 CI 体验的持续时间通常与听觉功能的恢复有关，但它对多感官性能的影响仍然不确定。在本研究中，我们使用了羊皮纸皮肤错觉，这是一种基于听觉频率变化的对触觉有声音偏向感知的有力说明，以研究 CI 用户中听觉-触觉相互作用的特异性。尽管相对较少有 CI 体验的个体与对照组表现相似，但经验丰富的 CI 用户表现出明显更大的错觉感知。总体结果表明，尽管 CI 用户在时间听觉-触觉任务中能够忽略听觉干扰，但他们在频谱听觉-触觉任务中会受到听觉输入的极大影响。结合现有的研究成果，这些结果证实了 CI 用户的正常感觉相互作用处理可能受到损害。
