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简单和复杂的语音运动任务之间的分离在双边运动体内
Karim Johari1, Joel I Berger2, Andrea H Rohl2
1Human Neurophysiology & Neuromodulation Lab, Department of Communication Sciences and Disorders, Louisiana State University, Baton Rouge, Louisiana 70806.
丘脑在语音产生中发挥着关键作用,在复杂的任务 (如重复句子) 中增加了低频大脑活动. 这突出显示了丘陵体.
科学领域:
- 神经科学是一个神经科学.
- 发动机控制器的控制器
- 语音制作 语音制作
背景情况:
- 泰拉马斯因其在自愿运动中的作用而闻名.
- 它在复杂的运动任务 (如说话) 中的具体参与需要进一步研究.
研究的目的:
- 为了研究在不同复杂度的语音任务期间,双边丘脑内的神经活动.
- 阐明泰拉马斯在语言生产的规划和执行中的作用.
主要方法:
- 从13名参与者获得了电子生理学记录,这些参与者在清醒状态下进行深度脑刺激手术时出现了基本震.
- 在三个语音任务中分析了神经活动:元音发音,二动力学 (DDK) 任务和句子重复.
- 分析的重点是双边运动体内的低频 (delta/theta) 和β频段活动.
主要成果:
- 与母音发音相比,在DDK和句子重复过程中,双边运动丘脑中观察到低频 (delta/theta) 活动增加.
- 与DDK和母音任务相比,在重复句子之前注意到β带活动功率的更大降低.
- 这些发现表明双边丘脑在语言的认知和运动规划方面发挥了作用.
结论:
- 双侧丘脑参与语言的产生,特别是复杂的任务需要增强的认知资源.
- 增加的低频活动可能反映了通过皮质 - 乳头 - 皮质路径对语音运动计划的时间监测.
- 观察到的β频段变化表明,在复杂的语音任务的规划阶段,丘脑起着重要的作用,这可能对神经语音障碍产生潜在影响.
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