B. NARDI, G. BORSETTI, M. BRANDONI, C.CHERUBINI, R. COLOCCI, R. LUCONI, G. PANNELLI, E. PUCCI - Vol. 6, Giugno 2000, num.2
Testo Immagini Bibliografia Summary Riassunto Indice
Modificazioni bioelettriche, valutate
mediante eeg computerizzato (eeg-c), durante prove di
ascolto musicale
Computerized EEG (C-EEG) evaluation of
bioelectrical changes during
musical tasks
B. NARDI, G. BORSETTI, M. BRANDONI, C.
CHERUBINI, R. COLOCCI, R. LUCONI, G. PANNELLI, E. PUCCI
Istituto di Discipline Psichiatriche e Sociomediche,
Ospedale "Umberto I",
Università di Ancona
Objectives
Aim of this work was to evaluate bioelectrical modifications during listening to music. Using computerized-EEG technology, patterns of information processing were analyzed in normal subjects. These subjects were subdivided in two groups: musicians and non-musicians.
Methods
Fourteen healthy right-handed subjects (seven musicians, range 25-43 years, mean age 34 years, and seven non-musicians, range 25-31 years, mean age 28 years), were investigated with computerized EEG (C-EEG). Each subject underwent: 1) hemispheric dominance Oldfield test, 2) psycho-sensory rest (PSR), 3) listening to instrumental music (IML), 4) listening to rustle of dark (RDL), 5) listening to instrumental and vocal music (IVML).
EEG activities recorded with nineteen electrodes (10-20 system) on the scalp were quantified by spectral methods (power and coherence spectra) to investigate power and coherence modifications during different tasks.
EEG spectra, concerning delta (0-4 Hz), theta (4-8 Hz), alpha (8-12 Hz), and beta (12-32 Hz) absolute frequency bands, were statistically evaluated by means of the T-Test.
For each task, spectra of absolute power in both musicians and non-musicians groups were analyzed.
Results
At the C-EEG, statistically significant differences in IML and IVML tasks were observed in musicians with respect to non musicians.
During the IML task, a reduction of theta activity (p < 0.05) in bilateral temporal regions and in left frontal region and a reduction of alpha activity in bilateral frontal-temporal-parietal regions (p < 0.02) were observed in musicians.
During the IVML task, a reduction of theta activity in bilateral temporal regions (p < 0.05) and left frontal region (p < 0.02) was observed in musicians.
In the same musical task, a reduction of alpha activity in right frontal region (p < 0.05) and in left temporal region (p < 0.03) was observed in musicians.
Conclusions
In normal subjects, listening to musical tasks (IML and IVML), specific bioelectrical activity modifications were observed. Such bioelectrical modifications were more evident in musicians, with respect to non-musicians (statistically significant decrease of theta and alpha activity), showing their analytical and evaluative abilities during musical tasks.