Abstract
Each organ of the human body has some synchronism, affiliation and connection to one another. Typically, the biomedical signal electrocardiography (ECG) and electroencephalography (EEG) are considered as the main signals for analysis and handling of circulatory and central nervous system-related anomalies. In this scenario, non-invasive, cost-effective, minimal effort and precise continuous monitoring of aforementioned systems is needed. Stand-alone ECG and EEG signals utilized in the investigation of corresponding abnormalities may lead to insufficient analysis and inadequate results in many situations where the abnormalities are interrelated to both the systems. Both ECG and EEG signals are utilized simultaneously in neurocardiology for study of heart- and brain-related problems. Thus, signal processing of such signals is of utmost importance. Coherence analysis is an important signal processing technique to correlate ECG and EEG signals. In this paper, magnitude squared coherence (MSC) and phase coherence (PC) are used to determine the coherence between the ECG and EEG signals. Also, various mathematical and experimental techniques used to determine the coherence between circulatory and nervous system are discussed concurrently to signify the necessity of adaptive and intelligent signal processing techniques. A case study is presented with statistical results and graphical illustrations to validate the use of signal processing techniques. The results of proposed techniques can be used to construct an intelligent decision-making system for early prediction and detection of various abnormalities of neuro-cardiac systems.
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Acknowledgements
The authors are profoundly thankful to Vellore Institute of Technology, Vellore, India, and V. R. Siddhartha Engineering College, Vijayawada, India.
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Polepogu, R., Vaegae, N.K. (2021). Signal Processing Techniques for Coherence Analysis Between ECG and EEG Signals with a Case Study. In: Sharma, H., Saraswat, M., Yadav, A., Kim, J.H., Bansal, J.C. (eds) Congress on Intelligent Systems. CIS 2020. Advances in Intelligent Systems and Computing, vol 1335. Springer, Singapore. https://doi.org/10.1007/978-981-33-6984-9_48
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