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相关概念视频

Pulse rhythm01:30

Pulse rhythm

1.4K
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
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Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

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Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
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ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

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An electrocardiogram (ECG)graphically represents the heart's electrical activity on ECG paper or a monitor.
Components of the Electrocardiogram
The primary components of a normal ECG waveform in Normal sinus rhythm(NSR) include the P wave, PR interval, QRS complex, ST segment, T wave, and occasionally a U wave.
ECG waveforms are divided by vertical and horizontal lines at standard intervals.
The horizontal axis measures time and rate, and the vertical axis measures amplitude or voltage....
14.0K
Circadian Rhythms and Gene Regulation02:19

Circadian Rhythms and Gene Regulation

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The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
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Electrophysiology of Normal Cardiac Rhythm01:19

Electrophysiology of Normal Cardiac Rhythm

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The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
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Assessment of Ventilation II: Respiratory Depth and Rhythm01:29

Assessment of Ventilation II: Respiratory Depth and Rhythm

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Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
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相关实验视频

Updated: Feb 5, 2026

Millisecond Hydrogen/Deuterium-Exchange Mass Spectrometry for the Study of Alpha-Synuclein Structural Dynamics Under Physiological Conditions
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阿尔法节奏:从生理学到行为

Ole Jensen1,2, Mathilde Bonnefond3

  • 1Oxford Centre for Human Brain Activity, Wellcome Centre for Integrative Neuroimaging, Department of Psychiatry, University of Oxford, Oxford, OX3 7JX, UK.

Physiological reviews
|February 3, 2026
PubMed
概括

阿尔法振荡,一种脑波模式,不仅仅是休息,而且通过抑制无关大脑区域来积极支持认知任务. 了解阿尔法节律调节提供了对注意力缺陷和衰老的见解.

关键词:
一个看不见的眼睛在这里,我们可以看到MEG MEG MEG.振荡的振荡是如何发生的这是一个同步的同步.波浪 波浪 波浪 波浪

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EEG Mu Rhythm in Typical and Atypical Development
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Uncovering Beat Deafness: Detecting Rhythm Disorders with Synchronized Finger Tapping and Perceptual Timing Tasks
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Uncovering Beat Deafness: Detecting Rhythm Disorders with Synchronized Finger Tapping and Perceptual Timing Tasks

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科学领域:

  • 神经科学是一个神经科学.
  • 认知科学 认知科学
  • 电子生理学 电子生理学

背景情况:

  • 阿尔法节奏是清醒的人类大脑的一个关键的电生理学特征.
  • 历史上被视为休息的标志,最近的研究表明阿尔法振荡随着认知需求的增加而增加.
  • 这种转变重新定义了alpha的作用,从动状态到主动认知处理.

研究的目的:

  • 审查产生阿尔法振荡的生理机制.
  • 探索阿尔法振荡是如何在认知任务中调节的.
  • 调查阿尔法节律功能障碍与注意力相关障碍之间的联系.

主要方法:

  • 对生理机制的文献综述和阿尔法节奏生成的计算模型.
  • 对行为研究的分析,证明了认知范式中的α振荡调制.
  • 对与注意力相关的问题和阿尔法振荡障碍的研究进行了审查.

主要成果:

  • 阿尔法振荡积极抑制与任务无关的大脑区域,优化资源配置.
  • 阿尔法节律调制是人类各种认知任务中的一致的特征.
  • 缺陷的阿尔法振荡调制与与注意力相关障碍有关的表现缺陷有关.

结论:

  • 阿尔法振荡通过调节大脑活动,在认知功能中起着至关重要的作用.
  • 研究阿尔法节奏可以阐明注意力问题背后的机制,如ADHD和衰老.
  • 技术进步使得在自然环境和整个生命周期中对阿尔法振荡的新研究成为可能.