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相关概念视频

Anatomy of the Heart01:27

Anatomy of the Heart

93.3K
The human heart is made up of three layers of tissue that are surrounded by the pericardium, a membrane that protects and confines the heart. The outermost layer, closest to the pericardium, is the epicardium. The pericardial cavity separates the pericardium from the epicardium. Beneath the epicardium is the myocardium, the middle layer, and the endocardium, the innermost layer. There are four chambers of the heart: the right atrium, the right ventricle, the left atrium, and the left ventricle.
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Heart Failure Drugs: Inotropic Agents01:26

Heart Failure Drugs: Inotropic Agents

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Positive inotropic agents are commonly used as the first line of treatment for heart failure. One such agent is digoxin, derived from the genus Digitalis, which has been known for centuries but effectively utilized since 1785. However, these cardiac glycosides can have potentially toxic effects due to their mechanism of action, which involves inhibiting Na+/K+-ATPase and increasing contractility. Digoxin is absorbed orally and distributed in various tissues, including the CNS. It has a long...
2.0K
Overview of the Heart01:07

Overview of the Heart

32.2K
The heart, a muscular organ located in the chest, functions as the body's pump, circulating blood through the vascular system. It has four chambers: two atria on top and two ventricles below. The right atrium receives deoxygenated blood from the body and passes it to the right ventricle, which pumps it to the lungs for oxygenation. The left atrium receives oxygenated blood from the lungs and transfers it to the left ventricle, which pumps it to the rest of the body.
The heart's structure...
32.2K
Development of the Heart01:27

Development of the Heart

3.9K
The development of the human heart, a crucial organ, commences from the mesoderm on the 18th or 19th day after fertilization. This process initiates in the cardiogenic area, a group of mesodermal cells at the embryo's head end, which evolves into elongated strands known as cardiogenic cords. These cords undergo a transformation to form hollow-centered endocardial tubes.
As the embryo undergoes lateral folding, these paired tubes approach each other, merging into a single primitive heart...
3.9K
Anatomy of the Heart01:20

Anatomy of the Heart

6.0K
The heart is a hollow, muscular organ approximately the size of a fist, consisting of four chambers. It is enclosed in the pericardium, a fibrous sac with two layers: the visceral and parietal pericardium, separated by a fluid-filled space containing serous fluid to reduce friction.
The heart has three layers: the innermost endocardium, the muscular myocardium, and the outer epicardium, all working together for optimal cardiac function.
Chambers of the Heart
The heart is made up of four...
6.0K
Physiology of the Heart: The Cardiac Cycle01:18

Physiology of the Heart: The Cardiac Cycle

15.9K
The cardiac cycle describes the events from one heartbeat to the next. It includes three main phases: diastole, atrial systole, and ventricular systole, all driven by changes in chamber pressures and the function of heart valves.
Diastole: The Relaxation Phase
During diastole, all four heart chambers relax. The atrioventricular (AV) valves open, and the semilunar valves close. This phase sees the lowest chamber pressures, promoting ventricular filling. Venous blood enters the heart through the...
15.9K

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相关实验视频

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Semi-automated Optical Heartbeat Analysis of Small Hearts
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超越:探索心脏记忆的叙事研究

Abdulkreem Al-Juhani1, Muhammad Imran1, Zeyad K Aljaili2

  • 1Surgery, King Abdulaziz University, Jeddah, SAU.

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概括

器官移植可能会转移捐赠者的记忆和情绪,这表明细胞记忆. 这挑战了我们对意识,身份和心脑连接的理解.

关键词:
这是心脏移植手术.细胞内存的细胞内存.心-大脑连接的连接.器官移植器官移植器官移植器官移植个人身份是个人身份.

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相关实验视频

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Brain Imaging Investigation of the Neural Correlates of Emotional Autobiographical Recollection
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科学领域:

  • 神经科学是一个神经科学.
  • 移植生物学 移植生物学
  • 思想的哲学 思想的哲学

背景情况:

  • 器官移植,尤其是心脏移植,提出了挑战传统观念的现象,对记忆,身份和意识.
  • 接受者有时报告经历与捐赠者相关的偏好,情绪和记忆,暗示通过移植器官传输记忆.

研究的目的:

  • 探索器官移植中的记忆转移潜力.
  • 研究心脏神经网络 (心脏大脑) 在记忆和个性中的作用.
  • 检查神经可塑性和器官整合对身份的影响.

主要方法:

  • 审查关于器官移植和记忆的案例研究和科学文献.
  • 分析关于记忆转移的拟议机制,包括细胞记忆,表观遗传学和能量相互作用.
  • 考虑半球切除手术的发现,以了解大脑的可塑性.

主要成果:

  • 有证据表明,移植器官,特别是心脏,可能会携带捐赠者的特定记忆,情绪和偏好.
  • 心脏的内在神经网络,或"心脏大脑",在与大脑的双向通信中发挥作用,影响人格和记忆.
  • 在半球切除术中观察到的大脑可塑性,突出显示了大脑结构,功能和个人身份之间的复杂相互作用.

结论:

  • 器官移植引发了关于记忆,身份和意识的深刻问题,表明了非神经元记忆存储的潜力.
  • 心脑连接和神经可塑性是理解移植后身体和精神如何整合的关键领域.
  • 进一步的跨学科研究对于解决伦理和哲学辩论以及改善移植和神经科学中的患者护理至关重要.