Functional corticomuscular coupling method of multi-scale compensated transfer entropy

An entropy transfer, multi-scale technology, applied in sensors, medical science, diagnostic recording/measurement, etc., can solve problems such as increasing computational complexity, and achieve the effect of alleviating the problem of mode mixing

Inactive Publication Date: 2021-04-09
HANGZHOU DIANZI UNIV
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Problems solved by technology

Since the multivariate signals collected by the multi-sensor acquisition system cannot avoid the power imbalance between different channels, and there is correlation between different channels, the uniform sampling method vector used by MEMD is not optimal for capturing the dynamics of multivariate quantities, using Projection vectors with a number greater than 127 greatly increase computational complexity; for low (8-31) to moderate (32-63) numbers of predictions and unbalanced correlation data channels, the algorithm provides suboptimal estimates of local means

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  • Functional corticomuscular coupling method of multi-scale compensated transfer entropy
  • Functional corticomuscular coupling method of multi-scale compensated transfer entropy
  • Functional corticomuscular coupling method of multi-scale compensated transfer entropy

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[0033] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation plan and a specific operation process.

[0034] The EEG signals of the motor cortex and the corresponding EMG signals of the opposite side of the limbs can respectively reflect the control information of the brain on the movement of the limbs and the feedback information of the muscles to the brain, revealing the functional coupling between the cerebral cortex and the corresponding muscles during the movement of the limbs connect. Therefore, it is particularly important to analyze the coupling characteristics of multi-channel EEG signals in different coupling directions at various scales for the study of the motor control mechanism of the central nervous system. The invention proposes a new multi-scale compensation ...

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Abstract

The invention relates to a functional corticomuscular coupling method of multi-scale compensated transfer entropy. The method comprises the following steps: firstly, carrying out time-frequency scaling on synchronously acquired electroencephalogram and electromyogram signals by adopting an APIT-MEMD method, then calculating multi-scale compensated transfer entropy values on different scales, and analyzing coupling characteristics of each scale in different coupling directions. Results show that the coupling strength between beta frequency bands is most remarkable under the condition of constant grip strength. Coupling strength in different coupling directions can show a certain change rule along with increase of grip strength. According to the method, the cortex functional coupling strength and the information transmission quantity of the electroencephalogram signals in different coupling directions and among multiple scales can be quantitatively described, and a certain theoretical basis is provided for exploring hand motion control and patient evaluation.

Description

technical field [0001] The invention belongs to the research field of nervous system motion control mechanism, and designs a new multi-scale compensation transfer entropy method, which combines the self-adaptive projection multivariate empirical mode method and compensation transfer entropy, does not use any model assumptions and excludes the instantaneous influence As a result, quantitatively analyze the cortical functional coupling strength and information transmission volume of EEG signals in different coupling directions and between various scales. Background technique [0002] The interplay between the motor cortex and effector muscles is considered a key feature for effective control of movement. It has been reported that functional corticomuscular coupling (FCMC) mainly occurs in the alpha frequency band (8–14 Hz) during sustained contractions, slow finger movements, and rapid transitions between two force targets; FCMC occurs in the beta frequency band (15–35 Hz) du...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/369A61B5/389A61B5/397A61B5/372A61B5/374A61B5/00
CPCA61B5/7235
Inventor 佘青山张敏孟明张启忠
Owner HANGZHOU DIANZI UNIV
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