Auditory-motor adaptation is reduced in adults who stutter but not in children who stutter
Auditory-motor adaptation is reduced in adults who stutter but not in children who stutter
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DOI：
10.1111/desc.12521
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发表时间：
2018-03-01
影响因子：
3.7
通讯作者：
Chang, Soo-Eun
中科院分区：
文献类型：
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作者：
Daliri, Ayoub;Wieland, Elizabeth A.;Chang, Soo-Eun
以前的研究表明，口吃的成年人产生较小的纠正运动反应，以弥补意外的听觉扰动相比，成年人谁不口吃，这表明口吃可能与赤字的整合听觉反馈在线语音监测。在这项研究中，我们研究了口吃是否也与整合和使用预期和收到的听觉反馈之间的差异，以适应性地更新运动程序，准确的语音生产的缺陷。使用感觉运动适应范式，我们测量了适应性言语反应听觉共振峰频率扰动的成人和儿童口吃和他们的匹配nonstuttering控制。我们发现，口吃儿童的言语适应反应的大小与流利儿童没有差异。然而，适应幅度的成年人谁口吃的听觉干扰的反应显着小于适应幅度的成年人谁不口吃。总之，这些结果表明，口吃是与赤字整合预测和接收的听觉反馈之间的差异，以校准成人的语音生产系统，但不是儿童。因此，这种听觉-运动整合缺陷似乎是多年口吃形成的补偿效应。
Previous studies have shown that adults who stutter produce smaller corrective motor responses to compensate for unexpected auditory perturbations in comparison to adults who do not stutter, suggesting that stuttering may be associated with deficits in integration of auditory feedback for online speech monitoring. In this study, we examined whether stuttering is also associated with deficiencies in integrating and using discrepancies between expected and received auditory feedback to adaptively update motor programs for accurate speech production. Using a sensorimotor adaptation paradigm, we measured adaptive speech responses to auditory formant frequency perturbations in adults and children who stutter and their matched nonstuttering controls. We found that the magnitude of the speech adaptive response for children who stutter did not differ from that of fluent children. However, the adaptation magnitude of adults who stutter in response to auditory perturbation was significantly smaller than the adaptation magnitude of adults who do not stutter. Together these results indicate that stuttering is associated with deficits in integrating discrepancies between predicted and received auditory feedback to calibrate the speech production system in adults but not children. This auditory-motor integration deficit thus appears to be a compensatory effect that develops over years of stuttering.