高频度的停顿后的单词选择和依赖任务的言语行为是轻度认知障碍患者连接言语的特征
Michael J Kleiman1, James E Galvin1
1Comprehensive Center for Brain Health, Department of Neurology, University of Miami Miller School of Medicine, Boca Raton, FL, USA.
Journal of Alzheimer's disease : JAD
|November 13, 2024
概括
停顿后的言语模式在轻度认知障碍 (MCI) 患者和健康对照人群之间有所不同. 这些语音差异,特别是词汇频率差异,可以帮助识别MCI,特别是在认知要求高的任务中.
科学领域:
- 神经学 神经学
- 语言学的语言学.
- 认知科学 认知科学
背景情况:
- 阿尔茨海默病 (AD) 涉及认知能力下降和语言障碍.
- 轻度认知障碍 (MCI) 是AD前症候群,表现出更微妙的语言变化.
- 调查MCI中停顿后的言语行为对于早期检测至关重要.
研究的目的:
- 为了确定MCI和健康对照 (HCs) 之间的停顿后言语行为是否有所不同.
- 评估认知任务需求如何影响这些语言差异.
- 确定语音指标,以区分MCI和HC.
主要方法:
- 来自MCI和HC组的转录语音样本的分析.
- 检查语音指标 (词汇,语法复杂性,频率,多样性,POS使用) 整体和停顿后.
- 跨任务的比较:叙事回忆,图片描述,自由响应.
主要成果:
- MCI组表现出更高的暂停发生率和更长的暂停后延迟时间.
- 在自由响应任务期间,MCI中词汇频率升高后填充暂停.
- 立即回忆任务在区分群体中最有效;随机森林模型显示高特异性.
结论:
- 停顿后的语言行为可靠地区分MCI和HC.
- 认知任务负载会影响这些语言差异的表现.
- 停顿后语音指标为MCI检测中的语音分析提供了一个实用的工具.
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