Epileptic seizure detection using near-ear EEG

Epileptic seizure detection using near-ear EEG

Bot, Chris (TU Delft Electrical Engineering, Mathematics and Computer Science)
de Groot, Arthur (TU Delft Electrical Engineering, Mathematics and Computer Science)
de Spirlet, Aurore (TU Delft Electrical Engineering, Mathematics and Computer Science)

Muratore, D.G. (mentor)
Lopes Marta da Costa, T.M. (mentor)
Al-Ars, Z. (graduation committee)
Endo, A. (graduation committee)

Delft University of Technology

Computer Engineering

A brain-computer interface inside your earphones

2022-06-21

60 million people around the world have epilepsy, which is a neurological disorder that severely impacts their day to day life negatively. Currently available methods to reduce the effects of epilepsy are either ineffective or require expensive and invasive surgery. A new method has been found that can suppress epilepsy without the need of surgery, called Transcutaneous Vagus Nerve Stimulation (t-VNS). Detecting epileptic seizures is important for this method, as the stimulation should only be used during a seizure. Traditionally, detecting epilepsy is done using scalp-Electroencephalography (EEG), which requires a controlled environment and is hard to use in day to day life. Recently, advancements have been made in ear-EEG, which allows for EEG outside a controlled environment. This study focuses on detecting epilepsy using ear-EEG. Ear-EEG was simulated using scalp-EEG channels close to the ear. After low-pass filtering and downsampling the results were obtained using features obtained from the Wavelet Transform (WT) and Fourier Transform (FT) in combination with several Machine Learning (ML) models; these being a random forest, a Support Vector Machine (SVM), and a Neural Network (NN). Furthermore PCA was also applied to the features, with a threshold of 0%, 95% and 99%. The results clearly show that using the WT outperforms features from the FT. Furthermore, out of the three models, the NN consistently has the best sensitivity for detecting seizures. The best sensitivity was achieved using WT features with a NN and a threshold of 99% for the PCA. The accuracy and sensitivity are 99.3% and 83.5% respectively, which is comparable to previous ear-EEG based research detecting epileptic seizures.

EEG
epilepsy
BCI
Seizures

http://resolver.tudelft.nl/uuid:2432ae2e-a2f0-4705-bb6a-bb5c423e9507

Student theses

bachelor thesis

© 2022 Chris Bot, Arthur de Groot, Aurore de Spirlet