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 33433.
停顿后的言语模式在轻度认知障碍 (MCI) 和健康对照 (HC) 个体之间有所不同. 这些受任务难度影响的语言行为,可以帮助区分MCI和HC.
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,影响言语.
- 轻度认知障碍 (MCI) 是AD的早期阶段,表现出微妙的语言变化.
研究的目的:
- 调查MCI和健康对照 (HCs) 之间的停顿后语音差异.
- 检查认知任务需求如何影响这些语言差异.
主要方法:
- 在叙事回忆,图片描述和自由响应任务中分析了来自MCI和HC组的语音样本.
- 检查了整体和停顿后的语音指标:词汇/语法复杂性,频率,多样性和部分语音使用.
主要成果:
- 而MCI组的休息时间更频繁,更长.
- 停顿后的词汇频率因任务而异,在自由响应期间MCI的频率更高.
- 立即召回任务对群体差异化最有效.
- 随机森林模型在使用语音指标来区分MCI和HC时取得了高的特异性.
结论:
- 停顿后的语言行为在MCI和HC之间有所不同,受认知负载的影响.
- 这些语音指标为MCI检测和分析提供了实用的工具.
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