Effects of observing own/others hand movement in different perspectives on mu rhythm suppression: an EEG study.

J Physiol Anthropol

Faculty of Design, Kyushu University, 4-9-1 Shiobaru, Minami-Ku Fukuoka City, Fukuoka, Japan.

Published: September 2024

AI Article Synopsis

  • This study looked at how our brain shows whether we see ourselves or someone else when we watch hand movements in videos.
  • Researchers used brain measurements from college students to find out if they react differently when watching their own hand movements versus others' movements.
  • They found that when students watched themselves in the first-person view, their brain activity changed a lot, but not as much when they watched from the third-person view, suggesting how we see things can change how we feel about ourselves compared to others.

Article Abstract

Background: Previous studies have reported that the sense of "self" is associated with specific brain regions and neural network activities. In addition, the mirror system, which functions when executing or observing an action, might contribute to differentiating the self from others and form the basis of the sense of self as a fundamental physical representation. This study investigated whether differences in mu suppression, an indicator of mirror system activity, reflect cognitions related to self-other discrimination.

Methods: The participants were 30 of healthy college students. The participants observed short video clips of hand movements performed by themselves or actors from two perspectives (i.e., first-person and third-person). The electroencephalogram (EEG) mu rhythm (8-13 Hz) was measured during video observation as an index of mirror neuron system activity. EEG activity related to self-detection was analyzed using participants' hand movements as self-relevant stimuli.

Results: The results showed that mu suppression in the 8-13-Hz range exhibited perspective-dependent responses to self/other stimuli. There was a significant self-oriented mu suppression response in the first-person perspective. However, the study found no significant response orientation in the third-person perspective. The results suggest that mirror system activity may involve self-other discrimination differently depending on the perspective.

Conclusions: In summary, this study examined the mirror system's activity for self and others using the EEG's mu suppression. As a result, it was suggested that differences in self and others or perspectives may influence mu suppression.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11373409PMC
http://dx.doi.org/10.1186/s40101-024-00369-0DOI Listing

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