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Characterizing the brain’s dynamical response from scalp-level neural electrical signals: a review of methodology development

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Abstract

The brain displays dynamical system behaviors at various levels that are functionally and cognitively relevant. Ample researches have examined how the dynamical properties of brain activity reflect the neural cognitive working mechanisms. A prevalent approach in this field is to extract the trial-averaged brain electrophysiological signals as a representation of the dynamical response of the complex neural system to external stimuli. However, the responses are intrinsically variable in latency from trial to trial. The variability compromises the accuracy of the detected dynamical response pattern based on trial-averaged approach, which may mislead subsequent modelling works. More accurate characterization of the brain’s dynamical response incorporating single trial variability information is of profound significance in deepening our understanding of neural cognitive dynamics and brain’s working principles. Various methods have been attempted to address the trial-to-trial asynchrony issue in order to achieve an improved representation of the dynamical response. We review the latest development of methodology in this area and the contribution of latency variability-based decomposition and reconstruction of dynamical response to neural cognitive researches.

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This figure is taken from Ouyang (2020). Permission has been obtained

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Figure was adapted from Ouyang et al. (2016). Permission has been obtained

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Figure was adapted from Ouyang et al. (2015). Permission has been obtained

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Acknowledgements

This work was partially supported by the Hong Kong Research Grant Council (ECS 27603818) and the Seed Fund for Basic Research from the University of Hong Kong (Nos. 201804159003, 201811159032) to G.O., and by the Hong Kong Baptist University Research Committee Interdisciplinary Research Matching Scheme (IRMS/16-17/04) to C.S.Z.

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Correspondence to Guang Ouyang or Changsong Zhou.

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Ouyang, G., Zhou, C. Characterizing the brain’s dynamical response from scalp-level neural electrical signals: a review of methodology development. Cogn Neurodyn 14, 731–742 (2020). https://doi.org/10.1007/s11571-020-09631-4

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  • DOI: https://doi.org/10.1007/s11571-020-09631-4

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