June 2006
Volume 6, Issue 6
Free
Vision Sciences Society Annual Meeting Abstract  |   June 2006
Identification of the cortical sources of the steady-state visual evoked potential: A vep-fMRI co-registration study
Author Affiliations
  • Francesco Di Russo
    Dept. of Education in Sports and Human Movement, University of Motor Sciences (IUSM) -Rome, Italy, and Santa Lucia Foundation IRCCS, Rome - Italy
  • Sabrina Pitzalis
    Santa Lucia Foundation IRCCS, Rome - Italy
  • Alessandra Stella
    Dept. of Education in Sports and Human Movement, University of Motor Sciences (IUSM) -Rome, Italy
  • Donatella Spinelli
    Dept. of Education in Sports and Human Movement, University of Motor Sciences (IUSM) -Rome, Italy, and Santa Lucia Foundation IRCCS, Rome - Italy
  • Steven A. Hillyard
    Dept. of Neurosciences, UCSD, La Jolla - CaliforniaUSA
Journal of Vision June 2006, Vol.6, 1095. doi:10.1167/6.6.1095
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to Subscribers Only
      Sign In or Create an Account ×
    • Get Citation

      Francesco Di Russo, Sabrina Pitzalis, Alessandra Stella, Donatella Spinelli, Steven A. Hillyard; Identification of the cortical sources of the steady-state visual evoked potential: A vep-fMRI co-registration study. Journal of Vision 2006;6(6):1095. doi: 10.1167/6.6.1095.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

This study aimed to characterize the neural generators of the steady-state visual evoked potential (SSVEP) to 6 Hz pattern-reversal gratings. Multichannel scalp recordings (64 channels)of SSVEPs and dipole modeling techniques were combined with functional magnetic resonance imaging (fMRI) and retinotopic mapping in order to estimate the locations of the cortical sources giving rise to second harmonic of SSVEP. Dipole locations were seeded to visual cortical areas in which fMRI activations were elicited by the same stimuli.

The results provide strong evidence that the major contribution to the SSVEP arises from activity in the primary visual cortex (area V1) and in motion sensitive area (MT/V5). Further contribution could be accounted for by dipoles that were in close proximity to fMRI activations in the the transverse parietal sulcus, ventral occipital areas VP and V4v and dorsal occipital areas V3A/V7. The present results showed that is possible decompose the steady-state VEP waveforms in a series of cortical components on the basis of their phase.

Present results provide a detailed spatio-temporal profile of the cortical origins of the SSVEP, which should enhance its utility in both clinical and basic studies of visual-perceptual processing.

Di Russo, F. Pitzalis, S. Stella, A. Spinelli, D. Hillyard, S. A. (2006). Identification of the cortical sources of the steady-state visual evoked potential: A vep-fMRI co-registration study [Abstract]. Journal of Vision, 6(6):1095, 1095a, http://journalofvision.org/6/6/1095/, doi:10.1167/6.6.1095. [CrossRef]
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×