相关实验视频

Updated: Jun 23, 2025

Cerebral Blood Flow-Based Resting State Functional Connectivity of the Human Brain using Optical Diffuse Correlation Spectroscopy

Cerebral Blood Flow-Based Resting State Functional Connectivity of the Human Brain using Optical Diffuse Correlation Spectroscopy

Published on: May 27, 2020

静态和动态功能连接在静止状态fMRI使用零频共振器的估计

Sukesh Kumar Das¹, Anil K Sao², Bharat B Biswal³

¹School of Computing and Electrical Engineering, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh, India.

Human brain mapping

|June 19, 2024

概括

使用零频共振器 (ZFR) 的新方法可靠地从静止状态fMRI (rs-fMRI) 中提取大脑活动事件. 这种方法改善了对静态和动态功能连接 (FC) 的估计,以更好地了解大脑组织.

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.
系统神经科学系统神经科学

背景情况:

休息状态功能磁共振成像 (rs-fMRI) 对于绘制大脑功能组织的地图至关重要.
了解自发的神经元活动,反映在血氧水平依赖 (BOLD) 信号中,仍然具有挑战性.
目前用于从rs-fMRI中提取时间事件的方法对噪声敏感,可能会错过关键信息.

研究的目的:

引入一种新的方法,从rs-fMRI时间过程中提取与事件相关的时间发作.
利用这些提取的事件来导出可靠的静态和动态功能连接 (FC).
评估新方法在描述休息状态大脑网络中的性能.

主要方法:

使用零频共振器 (ZFR) 在rs-fMRI数据中识别过渡的BOLD事件.
使用BOLD事件相对于种子的条件速率 (CR) 来导出静态功能连接 (FC).
计算的静态和动态FC使用ZFR检测事件周围识别的高信号噪声比 (SNR) 分段.

主要成果:

基于ZFR的CR在静态FC分析中有效区分了协同激活和非协同激活得分.
同激活模式 (CAP) 分析显示,稳定的静止状态网络具有占主导地位的长时间停留时间.
由ZFR驱动的高SNR段提供了可靠和一致的静态和动态FC估计.

结论:

用ZFR驱动的BOLD事件发病的提取为rs-fMRI分析提供了一个强大的方法.
这种方法提高了静态和动态功能连接的可靠性和一致性.
这些发现支持ZFR的实用性,以更深入地了解静止状态大脑动态.

关键词:

协同激活模式 (CAP) 是一种有条件的利率地图.功能连接性的功能连接性休息状态的fMRI.一个自发的BOLD事件.一个零频共振器的零频共振器.

更多相关视频

Dynamic Inter-subject Functional Connectivity Reveals Moment-to-Moment Brain Network Configurations Driven by Continuous or Communication Paradigms

Dynamic Inter-subject Functional Connectivity Reveals Moment-to-Moment Brain Network Configurations Driven by Continuous or Communication Paradigms

Published on: March 21, 2019

Whole-Brain 3D Activation and Functional Connectivity Mapping in Mice using Transcranial Functional Ultrasound Imaging

Whole-Brain 3D Activation and Functional Connectivity Mapping in Mice using Transcranial Functional Ultrasound Imaging

Published on: February 24, 2021

相关概念视频

Parallel Resonance

Parallel Resonance

The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:

Resonance in an AC Circuit

Resonance in an AC Circuit

The property of an inductor makes it resist any change in the current passing through it, while the property of a capacitor is to build up the charge across its terminals. Hence, if an inductor and capacitor are connected in series, they have opposite effects on the relative phase between current and voltage. The current through the circuit undergoes forced oscillation at the frequency of the source. The resistance term in an R-L-C circuit acts as a damping term because power is dissipated...