Using a motor imagery questionnaire to estimate the performance of a Brain-Computer Interface based on object oriented motor imagery

作者：Vuckovic Aleksandra^*; Osuagwu Bethel A

来源：Clinical Neurophysiology, 2013, 124(8): 1586-1595.

DOI：10.1016/j.clinph.2013.02.016

• Brain-Computer Interface
• BCI illiteracy
• Goal oriented imagination
• Kinaesthetic imagery
• Visual imagery
• Motor imagery questionnaire

Objectives: The primary objective was to test whether motor imagery (MI) questionnaires can be used to detect BCI %26apos;illiterate%26apos;. The second objective was to test how different MI paradigms, with and without the physical presence of the goal of an action, influence a BCI classifier. %26lt;br%26gt;Methods: Kinaesthetic (KI) and visual (VI) motor imagery questionnaires were administered to 30 healthy volunteers. Their EEG was recorded during a cue-based, simple imagery (SI) and goal oriented imagery (GOI). %26lt;br%26gt;Results: The strongest correlation (Pearson r(2) = 0.53, p = 1.6e-5) was found between KI and SI, followed by a moderate correlation between KI and GOI (r(2) = 0.33, p = 0.001) and a weak correlation between VI and SI (r(2) = 0.21, p = 0.022) and VI and GOI (r(2) = 0.17, p = 0.05). Classification accuracy was similar for SI (71.1 +/- 7.8%) and GOI (70.5 +/- 5.9%) though corresponding classification features differed in 70% participants. Compared to SI, GOI improved the classification accuracy in %26apos;poor%26apos; imagers while reducing the classification accuracy in %26apos;very good%26apos; imagers. %26lt;br%26gt;Conclusion: The KI score could potentially be a useful tool to predict the performance of a MI based BCI. The physical presence of the object of an action facilitates motor imagination in %26apos;poor%26apos; able-bodied imagers. %26lt;br%26gt;Significance: Although this study shows results on able-bodied people, its general conclusions should be transferable to BCI based on MI for assisted rehabilitation of the upper extremities in patients.

• 出版日期2013-8