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相关概念视频

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
Association Areas of the Cortex01:21

Association Areas of the Cortex

Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Functional Brain Systems: Limbic System01:15

Functional Brain Systems: Limbic System

The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
Functional Brain Systems: Reticular Formation01:13

Functional Brain Systems: Reticular Formation

The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
Within the reticular formation, there are several distinct nuclei that can be classified into three broad categories. The Raphe nuclei are located along the midline of the brainstem. They are primarily known for their role in synthesizing and releasing serotonin, a neurotransmitter involved in regulating mood, appetite, sleep, and circadian rhythms. The...
Brain Imaging01:14

Brain Imaging

Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).
False Memories01:18

False Memories

False memories represent a cognitive distortion in which individuals recall events that did not happen, or remember them in an altered form. This phenomenon highlights the brain's constructive nature in processing and recalling memories, emphasizing that memory is not a perfect representation of past events but rather a dynamic reconstruction influenced by various factors.
One primary source of false memories is misattribution, where individuals incorrectly associate external information with...

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相关实验视频

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Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging
17:06

Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging

Published on: November 8, 2012

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基于表面的功能性脑成像中的虚假相关性.

Jayson Jeganathan1,2, Nikitas C Koussis2,3,4, Bryan Paton1,2,3

  • 1School of Psychological Sciences, College of Engineering, Science and the Environment, University of Newcastle, Newcastle, NSW, Australia.

bioRxiv : the preprint server for biology
|July 19, 2024
PubMed
概括
此摘要是机器生成的。

功能性MRI (fMRI) 分析因表面映射中的顶点间距不均而有偏差,导致膨胀的相关性和虚假结果. 这种"肌肉偏差"会影响各种fMRI分析,需要采取缓解策略.

关键词:
偏见 偏见 偏见 偏见 偏见功能磁力共振成像 (fMRI) 是一种土地分片的使用方式.表面的表面表面的表面表面的表面

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科学领域:

  • 神经成像是一种神经成像.
  • 计算神经科学是一种神经科学.
  • 生物医学工程 生物医学工程

背景情况:

  • 功能性MRI (fMRI) 数据分析通常涉及将体积数据映射到表面网格.
  • 常见的加工管道创建网格与不均的顶点间距,在sulci比gyri更密集.

研究的目的:

  • 解释fMRI表面映射中的空间偏差的起源.
  • 为了说明这种偏差对使用in-silico模型的fMRI数据分析的影响.
  • 识别受影响的fMRI分析并提出解决方案.

主要方法:

  • 分析fMRI数据处理管道用于顶点间距.
  • 开发和使用模拟fMRI数据的in-silico模型.
  • 对常见的fMRI分析技术对空间偏差易感性的评估.

主要成果:

  • 表面网格中的顶点间距不均导致邻近的面fMRI时间序列之间具有人工强大的相关性.
  • 这种空间偏差,称为"陀螺偏差",导致解剖折叠信息泄露到功能数据中.
  • 常见的fMRI分析,如测试重复测试可靠性,指纹和功能分片被证明受到影响.

结论:

  • 这是一个很棒的节目,这是一个很棒的节目.
  • 旋转偏差是指旋转偏差.
  • 在基于表面的fMRI分析中是一个重要的工件.
  • 这种偏见可以导致神经成像研究中的虚假发现和误解.
  • 提供了建议,以减轻或纠正fMRI数据处理和分析中的这种空间偏差.