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Desynchronization of alpha rhythm in motor imagery task after a kinesthetic training

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Zapala D., Zabielska E., Cudo A., Krzysztofiak A., Francuz P.
Acta Neurobiologiae Experimentalis
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2012
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tom 72
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nr 2
Is has been shown that motor kinesthetic imagery in contrast to motor visual imagery serves better to control brain-computer interfaces which relay on ERD/ERS patterns. However many people still have problems with producing an adequate brain activity pattern and some of them are not familiar with kinesthetic motor imagery concept. The possible way to overcome this problem is by training of motor skills. Subject’s concentration on kinesthetic feelings may help in acquiring a better control of ERD/ERS patterns. To address this issue we replicated the experimental procedure for hand motor imagery task proposed by Hwang et al. (2009) but with modified training protocol. In the original study the neurofeedback-based training was used. We propose a physical hand training during which concentration on kinesthetic feelings is emphasized. The purpose of the experiment was to determine whether after a physical training focused on a kinesthetic experience of hand movement a significant differences in ERD/ERS patterns can be found. Ten healthy, right-handed males performed hand movement imagery task. The EEG data was recorded twice, once before and once after the physical training of hand movements focused on kinesthetic experience. Hwang H, Kwom K, Im Ch-H (2009) Neurofeedback-based motor imagery training for brain–computer interface. J Neurosci Methods 179: 150–156.
2

Effects of harmonics on aesthetic judgments of music: an ERP study involving laypersons and experts

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Jaskiewicz M., Francuz P., Zabielska-Mendyk E., Zapala D., Augustynowicz P.
Acta Neurobiologiae Experimentalis
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2016
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tom 76
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nr 2
The purpose of the study was to test whether aesthetic judgments of music are affected by expertise or harmonic violation of musical sequences. The participants were 14 musical experts and 13 laypersons; they were asked to judge the beauty and correctness of extracts from J.S. Bach’s chorales. Experts and laypersons showed different late positive potential (LPP) responses to the appraisal of correctness. LPP also proved to be sensitive to the extent to which the extracts violated harmonic expectations. The relationship between the early right anterior negativity potential (ERAN) and the harmonic correctness of chords was similar in laypersons and experts.
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