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Location and Orientation of the Heart01:13

Location and Orientation of the Heart

The human heart, despite its modest size and weight, is an organ of remarkable strength and endurance. Roughly the size of a fist, the heart weighs between 250 and 350 grams and is nestled within the mediastinum, the medial cavity of the thorax. It extends obliquely for about 12 to 14 cm, resting on the superior surface of the diaphragm. The heart is positioned anterior to the vertebral column and posterior to the sternum, with two-thirds of its mass lying to the left of the midsternal line.
Cerebral Hemispheres01:05

Cerebral Hemispheres

The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...

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相关实验视频

Updated: Jul 3, 2026

Brain Imaging Investigation of the Impairing Effect of Emotion on Cognition
16:08

Brain Imaging Investigation of the Impairing Effect of Emotion on Cognition

Published on: February 1, 2012

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分心器位置的统计学学习取决于任务上下文.

Jasper de Waard1,2, Dirk van Moorselaar3,4, Louisa Bogaerts3,4,5

  • 1Department of Experimental and Applied Psychology, Vrije Universiteit Amsterdam, Van der Boechorststraat 7, 1081 BT, Amsterdam, The Netherlands. j.m.de.waard@vu.nl.

Scientific reports
|July 11, 2023
PubMed
概括

人类可以根据任务上下文学会抑制视觉干扰因素. 这种学会抑制是取决于上下文的,显示其在现实世界的场景中的相关性.

更多相关视频

Irrelevant Stimuli and Action Control: Analyzing the Influence of Ignored Stimuli via the Distractor-Response Binding Paradigm
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Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking
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Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking

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相关实验视频

Last Updated: Jul 3, 2026

Brain Imaging Investigation of the Impairing Effect of Emotion on Cognition
16:08

Brain Imaging Investigation of the Impairing Effect of Emotion on Cognition

Published on: February 1, 2012

16.2K
Irrelevant Stimuli and Action Control: Analyzing the Influence of Ignored Stimuli via the Distractor-Response Binding Paradigm
12:12

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科学领域:

  • 认知心理学 认知心理学
  • 神经科学是一个神经科学.
  • 视觉注意力 视觉注意力

背景情况:

  • 统计学学习可以通过分心器来抑制视觉区域.
  • 之前的研究表明,学会抑制是无关上下文的,质疑其生态有效性.
  • 这项研究研究了分心规律的上下文依赖学习.

研究的目的:

  • 为了证明基于分心的规律的上下文依赖学习.
  • 探索任务上下文的作用,而不是背景线索,在学习压抑.
  • 检查学习抑制如何在不同的任务环境中持续或适应.

主要方法:

  • 参与者进行了交替的化合物搜索和检测任务.
  • 在训练期间,每个任务上下文都被分配了一个独特的高概率分心器位置.
  • 在测试过程中,干扰器的位置是同等可能的;分析了响应时间.

主要成果:

  • 参与者展示了分心器位置的上下文依赖学习.
  • 学习的抑制在任务环境中持续存在.
  • 除非引入一个新的高概率位置,否则压抑从以前的环境中延续.

结论:

  • 学习的视觉抑制取决于上下文,受任务类型的影响.
  • 任务上下文在学习和适应分心抑制方面发挥着至关重要的作用.
  • 学习抑制的持久性强调了在不断变化的环境中需要适应机制.