In this section
@article{Hammad:2016:10.1111/ner.12478,
author = {Hammad, SH and Kamavuako, EN and Farina, D and Jensen, W},
doi = {10.1111/ner.12478},
journal = {Neuromodulation},
pages = {804--811},
title = {Simulation of a Real-Time Brain Computer Interface for Detecting a Self-Paced Hitting Task.},
url = {http://dx.doi.org/10.1111/ner.12478},
volume = {19},
year = {2016}
}
TY - JOUR
AB - OBJECTIVES: An invasive brain-computer interface (BCI) is a promising neurorehabilitation device for severely disabled patients. Although some systems have been shown to work well in restricted laboratory settings, their utility must be tested in less controlled, real-time environments. Our objective was to investigate whether a specific motor task could be reliably detected from multiunit intracortical signals from freely moving animals in a simulated, real-time setting. MATERIALS AND METHODS: Intracortical signals were first obtained from electrodes placed in the primary motor cortex of four rats that were trained to hit a retractable paddle (defined as a "Hit"). In the simulated real-time setting, the signal-to-noise-ratio was first increased by wavelet denoising. Action potentials were detected, and features were extracted (spike count, mean absolute values, entropy, and combination of these features) within pre-defined time windows (200 ms, 300 ms, and 400 ms) to classify the occurrence of a "Hit." RESULTS: We found higher detection accuracy of a "Hit" (73.1%, 73.4%, and 67.9% for the three window sizes, respectively) when the decision was made based on a combination of features rather than on a single feature. However, the duration of the window length was not statistically significant (p = 0.5). CONCLUSION: Our results showed the feasibility of detecting a motor task in real time in a less restricted environment compared to environments commonly applied within invasive BCI research, and they showed the feasibility of using information extracted from multiunit recordings, thereby avoiding the time-consuming and complex task of extracting and sorting single units.
AU - Hammad,SH
AU - Kamavuako,EN
AU - Farina,D
AU - Jensen,W
DO - 10.1111/ner.12478
EP - 811
PY - 2016///
SP - 804
TI - Simulation of a Real-Time Brain Computer Interface for Detecting a Self-Paced Hitting Task.
T2 - Neuromodulation
UR - http://dx.doi.org/10.1111/ner.12478
UR - https://www.ncbi.nlm.nih.gov/pubmed/27513737
VL - 19
ER -