Summary
The sources of auditory evoked electric and magnetic responses were modelled with multiple current dipoles. The activity at the auditory cortices, 2.6 cm beneath the skull, explains the observed\(\overline {N100m}\) field distribution. An additional current source near the vertex is needed to explain the corresponding potential distributions. The locations of the current sources of\(\overline {N100m}\) did not show any systematic dependence on the tonal frequency.
Riassunto
Le sorgenti di risposte uditive magnetiche ed electtriche stimolate sono state formate con dipoli a corrente multipli. L’attività a livello delle cortecce uditive, 2.6 cm al di sotto della calotta cranica, spiega la distribuzione di campo osservata\(\overline {N100m}\). Un’ulteriore sorgente di corrente vicino al vertice è necessaria per spiegare le corrispondenti distribuzioni di potenziale. La posizione delle sorgenti di corrente di\(\overline {N100m}\) non ha mostrato alcuna dipendenza sistematica dalla frequenza tonale.
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Tuomisto, T., Hari, R., Katila, T. et al. Studies of auditory evoked magnetic and electric responses: Modality specificity and modelling. Il Nuovo Cimento D 2, 471–483 (1983). https://doi.org/10.1007/BF02455946
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DOI: https://doi.org/10.1007/BF02455946