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Fig. 4 | Journal of NeuroEngineering and Rehabilitation

Fig. 4

From: A brain-computer interface driven by imagining different force loads on a single hand: an online feasibility study

Fig. 4

Time-frequency analysis of EEG for different mental tasks. a The averaged time-frequency maps on C3 under multiple force load motor imagery tasks. The vertical line was marked at the onset of task, the blue color indicates the ERD phenomenon. b The mean ERSP on C3 at mu and beta rhythms during two stages of the experiment. c The averaged ERSP topography under multiple force load motor imagery tasks. d The significant difference topography between the high force load MI and low force load MI

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