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A study of action difference on motor imagery based on delayed matching posture task.

Mengfan Li1,2,3, Haoxin Zuo1,2,3, Huihui Zhou4

  • 1State Key Laboratory of Reliability and Intelligence of Electrical Equipment, School of Health Science and Biomedical Engineering, Hebei University of Technology, 300132 Tianjin, People's Republic of China.

Journal of Neural Engineering
|January 16, 2023
PubMed
Summary

Different actions impact motor imagery brain-computer interface (BCI) performance. Event-related potentials (ERPs) can indicate which actions yield better results, guiding personalized BCI training.

Keywords:
action differenceaction observationbrain-computer interfacedelayed matching posture taskevent-related potentialmotor imagery

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Human-Computer Interaction

Background:

  • Motor imagery (MI) based brain-computer interfaces (BCIs) decode action imagination intentions.
  • Individual imagination methods significantly influence MI-BCI performance.
  • The effect of different actions on MI performance and its manifestation in imagery remains unclear.

Purpose of the Study:

  • To investigate whether different actions cause variations in MI performance.
  • To identify methods for manifesting action differences during imagery to optimize MI-BCI effectiveness.
  • To explore the relationship between action selection and brain activity for personalized BCI training.

Main Methods:

  • A novel action observation based delayed matching posture task was developed.
  • Ten subjects observed, memorized, matched, and imagined three distinct actions (cutting, grasping, writing).
  • Event-related potentials (ERPs), MI features, and classification accuracy were analyzed to evaluate action differences.

Main Results:

  • Action differences led to distinct feature distributions, impacting MI-BCI performance.
  • Classification accuracy was 27.75% higher for actions with high event-related (de)synchronization (ERD/ERS) (p < 0.05).
  • Significant differences in ERP amplitudes were observed, with grasping showing higher P300-N200 amplitudes than cutting and writing (p < 0.05).

Conclusions:

  • Action differences significantly impact MI-BCI performance and can be reflected in feature distributions.
  • ERPs, particularly P300-N200 amplitudes, correlate with MI classification accuracy, serving as a potential index for action selection.
  • This study provides a basis for improving MI training and developing individualized BCIs by selecting optimal actions based on ERP indicators.