Medical & Biological Engineering & Computing

, Volume 48, Issue 3, pp 245–253

Unsupervised movement onset detection from EEG recorded during self-paced real hand movement

Original Article

DOI: 10.1007/s11517-009-0550-0

Cite this article as:
Awwad Shiekh Hasan, B. & Gan, J.Q. Med Biol Eng Comput (2010) 48: 245. doi:10.1007/s11517-009-0550-0


This article presents an unsupervised method for movement onset detection from electroencephalography (EEG) signals recorded during self-paced real hand movement. A Gaussian Mixture Model (GMM) is used to model the movement and idle-related EEG data. The GMM built along with appropriate classification and post processing methods are used to detect movement onsets using self-paced EEG signals recorded from five subjects, achieving True–False rate difference between 63 and 98%. The results show significant performance enhancement using the proposed unsupervised method, both in the sample-by-sample classification accuracy and the event-by-event performance, in comparison with the state-of-the-art supervised methods. The effectiveness of the proposed method suggests its potential application in self-paced Brain-Computer Interfaces (BCI).


Movement onset detectionElectroencephalographySelf-paced BCIGaussian Mixture ModelsUnsupervised learningPost processing

Copyright information

© International Federation for Medical and Biological Engineering 2009

Authors and Affiliations

  1. 1.BCI GroupUniversity of EssexColchesterUK