Hand somatosensory sub-cortical and cortical sources assessed by Functional Source Separation: an EEG study. (Articolo in rivista)

Type
Label
  • Hand somatosensory sub-cortical and cortical sources assessed by Functional Source Separation: an EEG study. (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • Porcaro C ; Coppola G; Di Lorenzo G; Zappasodi F; Siracusano A; Pierelli F; Rossini PM; Tecchio F; Seri S. (2009)
    Hand somatosensory sub-cortical and cortical sources assessed by Functional Source Separation: an EEG study.
    in Human brain mapping (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Porcaro C ; Coppola G; Di Lorenzo G; Zappasodi F; Siracusano A; Pierelli F; Rossini PM; Tecchio F; Seri S. (literal)
Pagina inizio
  • 660 (literal)
Pagina fine
  • 674 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 30 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1AFaR, Center of Medical Statistics and IT, Fatebenefratelli Hospital, Rome, Italy 2Institute for Advanced Biomedical Technologies (ITAB), ''G. D'Annunzio'' University, Chieti, Italy 3University of Rome ''Sapienza'' Polo Pontino, I.C.O.T. & IRCCS-Neuromed, Pozzilli (IS), Italy 4Laboratory of Psychophysiology, Psychiatric Clinic, Department of Neuroscience, University of Rome ''Tor Vergata\", Rome, Italy 5ISTC, CNR, Rome, Italy 6Clinica Neurologica, ''Campus Biomedico'' University, Rome, Italy 7Casa di Cura SAN RAFFAELE Cassino e IRCCS SAN RAFFAELE PISANA, Italy 8The Wellcome Trust Laboratory for MEG Studies, School of Life and Health Sciences, Aston University, Birmingham, United Kingdom (literal)
Titolo
  • Hand somatosensory sub-cortical and cortical sources assessed by Functional Source Separation: an EEG study. (literal)
Abstract
  • Abstract: We propose a novel electroencephalographic application of a recently developed cerebral source extraction method (Functional Source Separation, FSS), which starts from extracranial signals and adds a functional constraint to the cost function of a basic independent component analysis model without requiring solutions to be independent. Five ad-hoc functional constraints were used to extract the activity reflecting the temporal sequence of sensory information processing along the somatosensory pathway in response to the separate left and right median nerve galvanic stimulation. Constraints required only the maximization of the responsiveness at specific latencies following sensory stimulation, without taking into account that any frequency or spatial information. After source extraction, the reliability of identified FS was assessed based on the position of single dipoles fitted on its retroprojected signals and on a discrepancy measure. The FS positions were consistent with previously reported data (two early subcortical sources localized in the brain stem and thalamus, the three later sources in cortical areas), leaving negligible residual activity at the corresponding latencies. The highfrequency component of the oscillatory activity (HFO) of the extracted component was analyzed. The integrity of the low amplitude HFOs was preserved for each FS. On the basis of our data, we suggest that FSS can be an effective tool to investigate the HFO behavior of the different neuronal pools, recruited at successive times after median nerve galvanic stimulation. As FSs are reconstructed along the entire experimental session, directional and dynamic HFO synchronization phenomena can be studied. (literal)
Prodotto di
Autore CNR

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it