Perception of hand movement by mirror reflection evokes brain activation in the motor cortex contralateral to a non-moving hand. (August 2016)

• Record Type: Journal Article
• Authors: Debnath, Ranjan; Franz, Elizabeth A.
• Is Part Of: Cortex. Volume 81(2016)
• Page Start: 118
• Page End: 125
• Publication Date: 2016-08
• Subjects: Mirror visual feedback -- Visual perception -- Motor cortex -- Event related potential -- Lateralized readiness potential; Neuropsychology -- Periodicals; Nervous system -- Periodicals; Neurology -- Periodicals; Psychophysiology -- Periodicals; Behavior -- Periodicals; Neurology -- Periodicals; 612.825
• DOI: 10.1016/j.cortex.2016.04.015
• Languages: English
• ISSNs: 0010-9452

Abstract

Abstract: We investigated whether perception of hand movement via mirror reflection evokes activation in the motor cortex (M1) contralateral to the non-moving hand (the M1 ipsilateral to the moving hand). Continuous electroencephalography (EEG) was recorded from 14 participants while they performed unimanual extension–flexion hand movements in direct view and mirror view conditions. We measured the lateralized readiness potential (LRP) as a marker of M1 activation in both conditions. Both the direct and mirror view conditions produced LRPs, with the mirror view conditions revealing clear activation in M1 contralateral to the non-moving hand (ipsilateral to the moving hand) during both flexion and extension phases. This unambiguous demonstration of M1 activation in association with a non-moving hand (which is visually-perceived as moving), suggests that perception of movement can directly lead to M1 activation.