快速的听觉和语音处理依赖于左侧时间平面
Kelly C Martin1, Andrew T DeMarco2, Sara M Dyslin1
1Georgetown University Medical Center, Department of Neurology, Washington, DC, USA.
概括
左平原时 (PT) 的损伤损害了快速听觉信息的处理,这对于语音感知至关重要. 这个大脑区域对于区分快速的频率变化和处理复杂的语言任务,如伪词重复至关重要.
科学领域:
- 神经科学是一个神经科学.
- 审计处理 审计处理
- 语音感知 语音感知
背景情况:
- 语言处理主要以左侧为主,可能是由于左半球对快速语音组件的优势.
- 了解听觉处理的神经基础,特别是时间方面,是解释语言横向化的关键.
研究的目的:
- 为了调查左半球损伤是否会影响不同时间窗口的频率调制 (FM) 扫描的处理.
- 确定特定的大脑区域,特别是在左半球内,与快速时间变化的听觉处理受损相关.
- 确定大脑特定区域的损伤与语音感知和重复任务的表现之间的关系.
主要方法:
- 卒中幸存者 (n=50) 和对照组 (n=61) 在短时间 (25毫秒) 和长时间 (250毫秒) 的FM扫描中进行了判断.
- 使用支持向量回归病变-症状映射来将病变位置与性能缺陷相关联.
- 参与者在确定区域 (左平面时) 有或没有病变,在停止辅音识别和伪单词重复任务上进行了比较.
主要成果:
- 脑卒中幸存者在FM扫描判断方面表现明显差于对照者,特别是在短扫描方面.
- 损伤映射确定左侧平面 (PT) 对于短FM扫描的性能至关重要.
- 与没有PT病变的参与者相比,PT病变的参与者在停止辅音识别和伪词重复方面的表现有所下降.
结论:
- 左侧PT对于在短时间窗口内处理听觉信息至关重要.
- 左侧PT损伤损害了识别快速频率调制的能力,影响了语音声音感知.
- 左PT可以作为听觉处理和语言理解之间的关键联系,特别是在需要快速排序的任务中.
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