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相关概念视频

Cardiac Output II: Effect of Stroke Volume on Cardiac Output01:22

Cardiac Output II: Effect of Stroke Volume on Cardiac Output

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Cardiac output (CO), the amount of blood the heart pumps per minute, is a parameter in cardiovascular physiology determined by stroke volume and heart rate. Stroke volume, the amount of blood pushed from one of the ventricles per heartbeat, is influenced by preload, afterload, and contractility.
Preload
Preload refers to the initial elongation of the cardiac myocytes before contraction and is related to the volume of blood filling the heart at the end of diastole, or end-diastolic volume. The...
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相关实验视频

Updated: Feb 17, 2026

Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
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使用F0和基于持续时间的特征来描述中风影响的语言.

M V S Jyothi1, Oindrila Banerjee1, D Govind2

  • 1Department of Computer Science and Engineering, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur, AP, 522302, India.

Scientific reports
|February 15, 2026
PubMed
概括
此摘要是机器生成的。

语音分析揭示了中风患者明显的音调 (F0) 和持续时间模式. 与健康人相比,中风患者表现出改变的F0轮和语音过渡持续时间.

关键词:
持续时间分析.在 F0 轮上.语音分析障碍 语音分析障碍脑中风语音分析过渡和稳定状态地区的过渡和稳定状态地区.

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科学领域:

  • 神经语言学是一种神经语言学.
  • 语音科学 语言科学
  • 生物医学工程 生物医学工程

背景情况:

  • 脑卒中可以显著影响语音的产生,影响像音调和持续时间这样的语音特征.
  • 描述这些语音变化对于诊断和康复至关重要.

研究的目的:

  • 分析中风患者发言中的音调 (F0) 和持续时间特征.
  • 为了区分中风幸存者和健康对照者之间的语言特征.

主要方法:

  • 从50名中风患者和50名健康说话者中开发了一个语音集.
  • 对F0轮和语音区域持续时间进行了性别特定的统计分析.
  • 利用塞普斯特拉系数分析来估计过渡和非过渡地区的持续时间.
  • 使用单向ANOVA测试验证实发现.

主要成果:

  • 中位数F0区分了中风患者和对照人群,女性显示较低的F0和男性显示较高的F0.
  • 脑卒中患者表现出较短的过渡区域和较长的非过渡区域 (稳定状态).
  • 在中风患者中观察到较高的相对过渡区域.

结论:

  • 语音中的F0和持续时间模式是区分中风患者和健康个体的可靠指标.
  • 这些声学特征为中风相关的语言障碍提供了潜在的生物标志物.
  • 进一步的研究可以根据这些发现探索基于这些发现的治疗干预措施.