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Detection of Movement Related Cortical Potentials in EEG

Ghasem-Sani, Omid | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47247 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Shamsollahi, Mohammad Bagher
  7. Abstract:
  8. Movement-Related Cortical Potentials (MRCPs) are a subset of Event Related Potentials (ERPs). The event that MRCPs are related to is the endogenous event of self-paced voluntary movement. Like many other ERPs, MRCPs have small amplitudes relative to the background EEG activity, making it difficult to detect them on a single-trial basis. Nevertheless, detection of MRCPs with good accuracy can be vastly benecial to automated rehabilitation systems and to Brain-Computer Interfaces. In this project, a new experimental protocol for MRCP is introduced and signals recorded using this protocol are analyzed. The protocol has been designed and recordings have been made by the author during the summer of 2015 at the CNBI lab at EPFL. A framework for detection of MRCPs is suggested and implemented and suitable performance measures for the detection system are chosen based on online and offline approaches. Moreover, some detection methods from the literature and a new mixed method are implemented based on the suggested framework and their online and offline performances are evaluated with measures suitable for each approach. The best performance achieved on the recorded data with an offline approach has an average maximum accuracy of 0.80 and with an online approach an average maximum AUC of 0.898 (equivalent to a TPR of 0.896 for a FPR of 0.174 at the ROC knee point)
  9. Keywords:
  10. Electroencephalography ; Detection ; Movement Related Cortical Potential (MRCP)

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