Med Biol Eng Comput - Sensorimotor cortical response during motion reflecting audiovisual stimulation: evidence from fractal EEG analysis.

Tópicos

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Resumo

Sensorimotor activity in response to motion reflecting audiovisual titillation is studied in this article. EEG recordings, and especially the Mu-rhythm over the sensorimotor cortex (C3, CZ, and C4 electrodes), were acquired and explored. An experiment was designed to provide auditory (Modest Mussorgsky's "Promenade" theme) and visual (synchronized human figure walking) stimuli to advanced music students (AMS) and non-musicians (NM) as a control subject group. EEG signals were analyzed using fractal dimension (FD) estimation (Higuchi's, Katz's and Petrosian's algorithms) and statistical methods. Experimental results from the midline electrode (CZ) based on the Higuchi method showed significant differences between the AMS and the NM groups, with the former displaying substantial sensorimotor response during auditory stimulation and stronger correlation with the acoustic stimulus than the latter. This observation was linked to mirror neuron system activity, a neurological mechanism that allows trained musicians to detect action-related meanings underlying the structural patterns in musical excerpts. Contrarily, the response of AMS and NM converged during audiovisual stimulation due to the dominant presence of human-like motion in the visual stimulus. These findings shed light upon music perception aspects, exhibiting the potential of FD to respond to different states of cortical activity.

Resumo Limpo

sensorimotor activ respons motion reflect audiovisu titil studi articl eeg record especi murhythm sensorimotor cortex c cz c electrod acquir explor experi design provid auditori modest mussorgski promenad theme visual synchron human figur walk stimuli advanc music student am nonmusician nm control subject group eeg signal analyz use fractal dimens fd estim higuchi katz petrosian algorithm statist method experiment result midlin electrod cz base higuchi method show signific differ am nm group former display substanti sensorimotor respons auditori stimul stronger correl acoust stimulus latter observ link mirror neuron system activ neurolog mechan allow train musician detect actionrel mean under structur pattern music excerpt contrarili respons am nm converg audiovisu stimul due domin presenc humanlik motion visual stimulus find shed light upon music percept aspect exhibit potenti fd respond differ state cortic activ

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