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Multiresolution directed transfer function approach for segment-wise seizure classification of epileptic EEG signal

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Abstract

Currently, with the bloom in artificial intelligence (AI) algorithms, various human-centered smart systems can be utilized, especially in cognitive computing, for the detection of various chronic brain diseases such as epileptic seizure. The primary goal of this research article is to propose a novel human-centered cognitive computing (HCCC) method for segment-wise seizure classification by employing multiresolution extracted data with directed transfer function (DTF) features, termed as the multiresolution directed transfer function (MDTF) approach. Initially, the multiresolution information of the epileptic seizure signal is extracted using a multiresolution adaptive filtering (MRAF) method. These seizure details are passed to the DTF where the information flow of high frequency bands is computed. Thereafter, different measures of complexity such as approximate entropy (AEN) and sample entropy (SAEN) are computed from the extracted high frequency bands. Lastly, a k-nearest neighbor (k-NN) and support vector machine (SVM) are used for classifying the EEG signal into non-seizure and seizure data depending on the multiresolution based information flow characteristics. The MDTF approach is tested on a standard dataset and validated using a dataset from a local hospital. The proposed technique has obtained an average sensitivity of 98.31%, specificity of 96.13% and accuracy of 98.89% using SVM classifier. The average detection rate of the MDTF approach is 97.72% which is greater than the existing approaches. The proposed MDTF method will help neuro-specialists to locate seizure information drift which occurs within the consecutive segments and between two channels. The main advantage of the MDTF approach is its capability to locate the seizure activity contained by the EEG signal with accuracy. This will assist the neurologists with the precise localization of the epileptic seizure automatically and hence will reduce the burden of time-consuming epileptic seizure analysis.

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The authors do not have the authorization to share the data publicly.

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Acknowledgements

This research is conducted under the regular guidance and future directions of Dr. Nandan Yardi, Senior consultant in epileptology and President, Indian Epilepsy Association, Pune chapter.

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Correspondence to Dhanalekshmi P. Yedurkar.

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This research work confirms that all experiments were performed following relevant guidelines and regulations. Also, this work confirms that the data obtained from the local hospital has been obtained and analysed under the consent and the guidance of Dr. Nandan Yardi, Senior consultant in Epileptology and President, Indian Epilepsy Association, Pune chapter, Pune.

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Yedurkar, D.P., Metkar, S.P. & Stephan, T. Multiresolution directed transfer function approach for segment-wise seizure classification of epileptic EEG signal. Cogn Neurodyn (2022). https://doi.org/10.1007/s11571-021-09773-z

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