Reproducibility of EEG-fMRI results in a patient with fixation-off sensitivity

Emanuela Formaggio, Silvia Francesca Storti, Ilaria Boscolo Galazzo, Luigi Giuseppe Bongiovanni, Roberto Cerini, Antonio Fiaschi, Paolo Manganotti

Research output: Contribution to journalArticlepeer-review


Blood oxygenation level-dependent (BOLD) activation associated with interictal epileptiform discharges in a patient with fixation-off sensitivity (FOS) was studied using a combined electroencephalography-functional magnetic resonance imaging (EEG-fMRI) technique. An automatic approach for combined EEG-fMRI analysis and a subject-specific hemodynamic response function was used to improve general linear model analysis of the fMRI data. The EEG showed the typical features of FOS, with continuous epileptiform discharges during elimination of central vision by eye opening and closing and fixation; modification of this pattern was clearly visible and recognizable. During all 3 recording sessions EEG-fMRI activations indicated a BOLD signal decrease related to epileptiform activity in the parietal areas. This study can further our understanding of this EEG phenomenon and can provide some insight into the reliability of the EEG-fMRI technique in localizing the irritative zone.

Original languageEnglish
Pages (from-to)212-217
Number of pages6
JournalClinical EEG and Neuroscience
Issue number3
Publication statusPublished - 2014


  • EEG-fMRI
  • Fixation-off sensitivity
  • Hemodynamic response function (HRF)

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology


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