Source Extraction Representing Thumb and Little Finger Cortical Networks and Intra-Hand-Area Evoked Synchrony

Franca Tecchio, Sara Graziadio, Giulia Barbati, Roberto Sigismondi, Filippo Zappasodi, Camillo Porcaro, Giancarlo Valente, Marco Balsi

2005

Abstract

A novel cerebral source extraction method is proposed (Functional Source Separation, FSS) starting from extra-cephalic magnetoencephalographic (MEG) signals in humans, based on source functional reactivity to the external stimulation. Their activity is obtained all along the rest state and during processing of a simple separate sensory stimuli of thumb or little finger. This method provides cerebral sources describing thumb and little finger primary representations, as demonstrated by their higher responsiveness to the corresponding finger stimuli and their different positions consistent with the homuncular organization. A dynamical index describing intra-regional synchrony was introduced, which showed higher levels when stimulating the thumb with respect to little finger stimulation, selectively in the gamma band ([33, 44]Hz). This indicates that the stimulation of a functionally prevalent finger (thumb) activates a cortical network more synchronized in the gamma band than a non-prevalent one (little finger).

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Paper Citation


in Harvard Style

Tecchio F., Graziadio S., Barbati G., Sigismondi R., Zappasodi F., Porcaro C., Valente G. and Balsi M. (2005). Source Extraction Representing Thumb and Little Finger Cortical Networks and Intra-Hand-Area Evoked Synchrony . In Proceedings of the 1st International Workshop on Biosignal Processing and Classification - Volume 1: BPC, (ICINCO 2005) ISBN 972-8865-35-X, pages 12-18. DOI: 10.5220/0001192400120018


in Bibtex Style

@conference{bpc05,
author={Franca Tecchio and Sara Graziadio and Giulia Barbati and Roberto Sigismondi and Filippo Zappasodi and Camillo Porcaro and Giancarlo Valente and Marco Balsi},
title={Source Extraction Representing Thumb and Little Finger Cortical Networks and Intra-Hand-Area Evoked Synchrony},
booktitle={Proceedings of the 1st International Workshop on Biosignal Processing and Classification - Volume 1: BPC, (ICINCO 2005)},
year={2005},
pages={12-18},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001192400120018},
isbn={972-8865-35-X},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 1st International Workshop on Biosignal Processing and Classification - Volume 1: BPC, (ICINCO 2005)
TI - Source Extraction Representing Thumb and Little Finger Cortical Networks and Intra-Hand-Area Evoked Synchrony
SN - 972-8865-35-X
AU - Tecchio F.
AU - Graziadio S.
AU - Barbati G.
AU - Sigismondi R.
AU - Zappasodi F.
AU - Porcaro C.
AU - Valente G.
AU - Balsi M.
PY - 2005
SP - 12
EP - 18
DO - 10.5220/0001192400120018