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相关概念视频

Lateralization01:28

Lateralization

481
Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
481
Cerebral Hemispheres01:05

Cerebral Hemispheres

524
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...
524

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相关实验视频

Updated: Sep 12, 2025

Assessment of Cerebral Lateralization in Children using Functional Transcranial Doppler Ultrasound fTCD
07:44

Assessment of Cerebral Lateralization in Children using Functional Transcranial Doppler Ultrasound fTCD

Published on: September 27, 2010

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视觉空间功能神经侧向化的发展变化? 来自线切割任务的证据.

Katrina Ferrara1,2, Anna Seydell-Greenwald1, Catherine E Chambers1

  • 1Center for Brain Plasticity and Recovery, Georgetown University, Washington DC, USA.

Developmental science
|August 9, 2025
PubMed
概括
此摘要是机器生成的。

对于诸如线截面等空间任务,大脑的横向化在儿童早期就已经形成了. 与语言发展不同的是,空间处理在5岁到12岁之间显示出稳定的右半球主导地位.

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Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice
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Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention
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相关实验视频

Last Updated: Sep 12, 2025

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Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice
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Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention
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科学领域:

  • 神经科学是一个神经科学.
  • 发展心理学 发展心理学
  • 认知科学 认知科学

背景情况:

  • 半球专业化传统上将语言分配给左半球,将空间功能分配给右半球.
  • 证据主要来自成年人和病变患者的研究,使得侧面化发育起源的理解变得不太清楚.
  • 幼儿 (4-6岁) 的语言处理显示出双边激活,在儿童时期晚些时候转向左半球主导.

研究的目的:

  • 为了研究儿童的空间任务的横向化发展轨迹.
  • 为了确定空间任务是否表现出与语言中观察到的类似的发育横向化转移.
  • 为了检查功能磁共振成像 (fMRI) 激活在线切割任务在5-12岁儿童.

主要方法:

  • 用功能磁共振成像 (fMRI) 来测量大脑活动.
  • 参与者是5-12岁的儿童.
  • 这项任务涉及判断两截断的垂直直线的较长端,这是一个空间判断任务.

主要成果:

  • 儿童始终表现出右侧激活在部和后部区域.
  • 这些激活模式反映了成年人对线切割任务的研究中观察到的情况.
  • 在5-12岁的年龄范围内,没有发现与年龄相关的右侧化程度的显著变化.

结论:

  • 空间处理,特别是对线截面任务的空间处理,似乎从幼儿时期就稳定地向右半球横向.
  • 这与语言函数中观察到的发展双边表示和随后的左侧化形成鲜明对比.
  • 了解侧面化的发育轨迹对于理解大脑组织的一般原则至关重要.