Research on human sensorimotor functions has hugely increased after electromyogram (EMG) analysis was replaced by functional magnetic resonance imaging (fMRI), that allows to obtain a direct visualization of the brain areas involved in motor control. Very meaningful results could be obtained if the two analysis could be correlated. Our goal is to acquire the EMG data during an fMRI task. The main problems in doing this are related to the electromagnetic compatibility between the resonance coils (very high magnetic fields) and the EMG electrodes. In this study we developed a system that can characterize the entire EMG signal corrupted by the magnetic fields generated by the magnetic resonance gradients. The entire system consists in a hardware equipment (shielded cables and wires) and a software analysis (effective mean analysis and wavelet analysis). The results show that a motor task was correctly delivered by our post processing analysis of the signal.
|Titolo:||Time-Frequency Analysis for Characterizing EMG Signals During fMRI Acquisitions|
|Data di pubblicazione:||2004|
|Nome del convegno:||15th Italian Workshop on Neural Nets, WIRN VETRI 2004|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1007/1-4020-3432-6_37|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|