No Evidence of an Effect of a Single Mirror Visual Feedback Session on Subsequent Motor Imagery

A single mirror visual feedback session did not significantly change subsequent kinesthetic motor imagery–related mu-band (8–12 Hz) event-related desynchronization in healthy participants (n=38).

• Why it matters: Mirror visual feedback and motor imagery both engage sensorimotor networks, and concurrent use has been linked to enhanced activation, but immediate aftereffects of a single MVF session are unclear.
• What they did: EEG from 38 healthy participants (MVF n=18; sham n=20) was recorded during kinesthetic motor imagery before and after MVF or sham, focusing on mu-band (8–12 Hz) ERD and hemispheric lateralization.
• The result: Kinesthetic motor imagery produced stronger contralateral than ipsilateral mu ERD, but MVF did not significantly affect subsequent mu ERD or its hemispheric lateralization, suggesting any facilitation may depend on concurrent application.

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