[关于衰老对听觉语音理解双路线区域大脑活动模式的影响研究]
1Beijing Institute of Otolaryngology, Otolaryngology-Head and Neck Surgery, Key Laboratory of Otolaryngology Head and Neck Surgery (Capital Medical University), Ministry of Education, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China.
听觉语音理解涉及复杂的大脑活动,随着年龄和噪音而变化. 老年人显示听觉区域的活动减少,但在杂的环境中,补偿区域的活动增加.
科学领域:
- 神经科学是一个神经科学.
- 听觉感知是一种听觉感知.
- 衰老的衰老 衰老的衰老
背景情况:
- 听觉语音理解依赖于复杂的神经网络.
- 衰老会影响认知功能,包括听觉处理.
- 倾听环境显著影响语音感知.
研究的目的:
- 为了研究语音理解过程中神经活动的与年龄相关的变化.
- 为了检查不同的听力环境如何调节这些与年龄相关的神经动态.
主要方法:
- 功能近红外光谱 (fNIRS) 测量了93名健康成年人 (20-70岁) 的大脑活动.
- 参与者在安静和杂的环境中听到句子,信号与噪音比率 (SNR) 不同.
- 分析重点关注不同听觉条件下的神经活动与年龄相关的趋势.
主要成果:
- 关键的听觉和语音区域 (听觉皮层,韦尼克,布罗卡) 显示了改变的活动模式.
- 在安静和低噪音的情况下,听觉皮质活动随着年龄的增长而下降.
- 在较高的噪音中,补偿区域 (右半球) 随着年龄的增长显示出活动增加,而其他区域则下降.
结论:
- 双通道大脑区域在语音理解过程中显示出不同的活动模式.
- 增加的噪音加剧了与年龄相关的听觉处理的下降,影响了更多的大脑区域.
- 老龄化导致大多数语音理解区域的活动减少,但在特定的右半球噪音补偿区域的活动增加.
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