基于连接的元频段:在连接分析中自动识别频段的新方法
Víctor Rodríguez-González1, Pablo Núñez2, Carlos Gómez1
1Biomedical Engineering Group, University of Valladolid, Valladolid, Spain; Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III (CIBER-BBN), Spain.
NeuroImage
|August 24, 2023
概括
这项研究引入了一种新的数据驱动方法,即基于连接的Meta-Bands (CMB),用于识别个性化的大脑信号频率范围. 该CMB算法揭示了传统方法错过的个体神经特征,改进了大脑连接分析.
科学领域:
- 神经科学是一个神经科学.
- 计算神经科学是一种神经科学.
- 信号处理 信号处理
背景情况:
- 目前的脑电图 (EEG) 和脑磁图 (MEG) 分析通常使用固定的"规范"频段.
- 这种方法缺乏个体适应,可能会限制神经信号分析的准确性.
- 现有的方法可能会忽略特定于主体的神经特征.
研究的目的:
- 开发和验证一种新的数据驱动方法,用于自动识别个性化的神经信号频率范围.
- 克服EEG和MEG研究中传统固定频段细分的局限性.
- 为了提高大脑连接分析的稳定性和个性化.
主要方法:
- 介绍了基于连接的Meta-Bands (CMB) 算法,这是一个数据驱动的方法,用于无监督的带段分割.
- 分析了195名健康受试者的静止状态MEG和EEG数据,使用窄频段 (1-70Hz) 过.
- 通过正交的振幅封面相关性和社区检测估计了依赖频率的功能神经网络.
主要成果:
- 该CMB算法成功识别了基于功能神经网络拓学的特定主体频率范围.
- 传统的正规频段与集团级 MEG 网络拓部分一致,但错过了个别模式.
- EEG信号对详细的频率依赖网络结构具有有限的灵敏度,显示出更简单的分片.
结论:
- 该CMB算法提供了一个强大的,个性化的方法来分析大脑连接,通过对个体神经特征进行核算.
- 这种方法超越了固定的频段,使得神经生理学研究更加准确和量身定制.
- 这些发现为探索不同人群中大脑连接的细微的频率依赖结构铺平了道路.
相关概念视频
Bandpass Sampling
205
In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
205
IR Frequency Region: Fingerprint Region
937
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
937
Mesh Analysis for AC Circuits
396
In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
396
¹³C NMR: ¹H–¹³C Decoupling
1.1K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.1K
Energy Bands in Solids
920
Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
920
Band Theory
15.3K
When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
15.3K


