同时执行工作记忆任务对帕金森病发病时语音声学的影响
Daria A Dragicevic1, Kimberly L Dahl1, Zoe Perkins1
1Department of Speech, Language and Hearing Sciences, Boston University, MA.
American journal of speech-language pathology
|December 11, 2023
概括
同时执行工作记忆任务对帕金森病 (PD) 患者的语音声学没有产生差异性影响. 这一发现与已知的对四肢运动功能的影响形成鲜明对比,这表明语言可能对PD的认知负载更有弹性.
科学领域:
- 神经学 神经学
- 语音语言病理学 语言病理学
- 认知科学 认知科学
背景情况:
- 帕金森病 (PD) 是一种神经退行性疾病,影响运动控制,包括语音产生.
- 工作记忆在复杂的认知任务中起着至关重要的作用,可以影响运动性能.
研究的目的:
- 研究与帕金森病患者同时执行工作记忆任务对各种声学语音测量的影响.
- 为了确定认知负载是否与健康对照对PD的语音声学产生差异性影响.
主要方法:
- 患有PD的参与者和年龄/性别匹配的对照者在两个条件下执行了语音任务:具有并发工作记忆任务和没有并发工作记忆任务.
- 分析了包括塞普斯特拉峰突出度,光谱能量比率,基本频率可变性,发音率,暂停时间,母音空间和语音发声时间 (VOT) 在内的声学测量.
- 混合模型分析差异被用来评估组,条件和它们的相互作用的影响.
主要成果:
- 在患有PD的个体和对照人群之间观察到语音测量的显著差异,不包括VOT变化,平均暂停时间和相对FO偏移.
- 脑峰突出,关节率和相对FO偏移受工作记忆任务存在的影响.
- 重要的是,没有声学测量显示基于组 (PD与对照) 的工作记忆任务的差异效应.
结论:
- 尽管已知认知负载对PD运动功能的影响,但同时执行工作记忆任务并没有在该人群中不成比例地扰乱语音声学.
- 患有PD的个体的言语产生可能会对与肢体运动功能不同的同时存在的认知需求表现出一定程度的弹性.
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