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相关概念视频

The Blood-brain Barrier00:49

The Blood-brain Barrier

Overview
Blood Pressure01:30

Blood Pressure

Blood pressure (BP) is the pressure or force of blood exerted on the artery's walls as it circulates through the body. It is essential for maintaining blood flow throughout the body.
The average BP in an adult is typically around 120/80 mmHg (millimeters of mercury). In this measurement, the numerator (120) indicates the systolic pressure, which is the pressure in the arteries during the contraction of the heart's ventricles as blood is expelled. The denominator (80) represents the diastolic...
Cerebrospinal Fluid01:21

Cerebrospinal Fluid

Cerebrospinal fluid (CSF) is a colorless liquid that flows around the brain and the spinal cord, playing a vital role in the protection, support, and overall function of the central nervous system (CNS). CSF production, circulation, and absorption are tightly regulated processes essential for the brain and spinal cord to function properly.
CSF Production
CSF is produced mainly in the choroid plexus, a network of capillaries and ependymal cells located within the ventricular system of the brain.
Characteristics and Functions of Blood01:26

Characteristics and Functions of Blood

Blood is specialized connective tissue comprising about 8% of the body mass. It has a thick, liquid extracellular matrix that contains cells, dissolved proteins, and electrolytes, making it five times more viscous than water. Blood is warm, around 38°C, and has an alkaline pH ranging from 7.35 to 7.45.
The primary function of blood is to transport oxygen and carbon dioxide between tissues and the lungs. Oxygenated blood is bright red, while oxygen-depleted blood is darker. It also carries...
Neural Regulation of Blood Pressure01:18

Neural Regulation of Blood Pressure

The neural regulation of blood pressure involves intricate interactions between the autonomic nervous system (ANS) and cardiovascular system, ensuring adequate perfusion of tissues. This regulation primarily occurs through baroreceptor and chemoreceptor reflexes, involving both short-term and long-term mechanisms.
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
Neurotransmitters01:31

Neurotransmitters

Neurotransmitters are essential chemical messengers within the nervous system, facilitating the communication between neurons. These chemical messengers, varying in function and effect, are critical for sustaining various aspects of neurological health and emotional well-being.

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相关实验视频

Updated: Jul 14, 2026

Derivation, Expansion, Cryopreservation and Characterization of Brain Microvascular Endothelial Cells from Human Induced Pluripotent Stem Cells
08:04

Derivation, Expansion, Cryopreservation and Characterization of Brain Microvascular Endothelial Cells from Human Induced Pluripotent Stem Cells

Published on: November 19, 2020

血液中的水平和神经行为功能.

Megan Weil1, Joseph Bressler, Patrick Parsons

  • 1Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Md, USA. mweil@jhsph.edu

JAMA
|April 21, 2005
PubMed
概括

这项研究没有发现有力的证据表明,血中的水平会对老年城市成年人的神经行为表现产生负面影响. 虽然一些认知功能显示出轻微的关联,但总体结果表明,对于这一群体来说并不是一个重大问题.

科学领域:

  • 环境健康 环境健康
  • 神经科学是一个神经科学.
  • 老年学是指老年学的学科.

背景情况:

  • 对于老年人的心血管健康,建议食用鱼.
  • 老年人患认知障碍的风险更高.
  • 甲基是鱼类中的神经毒剂,可能会不成比例地影响这个群体.

研究的目的:

  • 为了研究血液中含量与神经行为测试得分之间的关系.
  • 评估城市成年人口中甲基暴露的潜在风险.

主要方法:

  • 对来自巴尔的摩记忆研究 (年龄在50-70岁) 的474名参与者的横截面分析.
  • 在全血样本中测量总.
  • 多重线性回归用于分析与20个神经行为测试成绩的关联.

主要成果:

  • 血液中水平的中位数为2.1微克/升.
  • 较高的水平与较差的视觉记忆相关 (雷氏复杂图像延迟回忆).
  • 较高的含量与更好的手工灵巧度相关 (指尖敲击).

结论:

  • 该研究没有发现强有力的证据表明血中的水平与老年城市成年人的神经行为表现差有关.

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Reconstruction of the Blood-Brain Barrier In Vitro to Model and Therapeutically Target Neurological Disease
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Reconstruction of the Blood-Brain Barrier In Vitro to Model and Therapeutically Target Neurological Disease

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Paired Cisterna Magna Nanoinjection and Laser Speckle Contrast Imaging Assay to Study Cerebral Blood Flow Regulation In Vivo
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Paired Cisterna Magna Nanoinjection and Laser Speckle Contrast Imaging Assay to Study Cerebral Blood Flow Regulation In Vivo

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相关实验视频

Last Updated: Jul 14, 2026

Derivation, Expansion, Cryopreservation and Characterization of Brain Microvascular Endothelial Cells from Human Induced Pluripotent Stem Cells
08:04

Derivation, Expansion, Cryopreservation and Characterization of Brain Microvascular Endothelial Cells from Human Induced Pluripotent Stem Cells

Published on: November 19, 2020

Reconstruction of the Blood-Brain Barrier In Vitro to Model and Therapeutically Target Neurological Disease
06:19

Reconstruction of the Blood-Brain Barrier In Vitro to Model and Therapeutically Target Neurological Disease

Published on: October 20, 2023

Paired Cisterna Magna Nanoinjection and Laser Speckle Contrast Imaging Assay to Study Cerebral Blood Flow Regulation In Vivo
06:24

Paired Cisterna Magna Nanoinjection and Laser Speckle Contrast Imaging Assay to Study Cerebral Blood Flow Regulation In Vivo

Published on: July 8, 2025

  • 结果表明,暴露于可能对认知和运动功能产生混合影响.