Common Spatial Pattern with Polarity Check for reducing delay latency in detection of MRCP based BCI system

Abstract

This work proposes a Common Spatial Pattern with Polarity Check (CSPPC) to facilitate Movement Related Cortical Potential (MRCP) detection. The algorithm was compared with the Locality Preserving Projection (LPP) algorithm in the context of detecting foot dorsiflexion within a group of thirteen subjects. It has been shown that CSPPC achieved a significantly reduced delay latency compared to LPP (−25.9±190.7 ms vs. 204.6±123.7 ms), which had a similar detection accuracy (true positive rate: 73.6±23.3% vs. 72.2±16.3%). This proposed algorithm will enhance the induction of neuroplasticity by significantly reducing the delay between movement detection and the corresponding afferent input.