Sequential activation of human oculomotor centers during planning of visually-guided eye movements: a combined fMRI-MEG study.
We used magneto-encephalography (MEG) to measure visually evoked activity in healthy volunteers performing saccadic eye movements to visual targets. The neuromagnetic activity was analyzed from regions of cortical activation identifi ed in separate functional magnetic resonance imaging (fMRI) studie...
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doaj-58f62b6febb84d66bad281a8596974962020-11-25T03:14:22ZengFrontiers Media S.A.Frontiers in Human Neuroscience1662-51612008-03-01210.3389/neuro.09.001.200788Sequential activation of human oculomotor centers during planning of visually-guided eye movements: a combined fMRI-MEG study.Carlo Sestieri0Carlo Sestieri1Vittorio Pizzella2Vittorio Pizzella3Francesco Cianflone4Francesco Cianflone5Gian Luca Romani6Gian Luca Romani7Maurizio Corbetta8Maurizio Corbetta9Maurizio Corbetta10Department of Clinical Sciences and Bioimages, “G. d’Annunzio” UniversityI.T.A.B. Institute for Advanced Biomedical Technologies, G. D‘Annunzio University FoundationDepartment of Clinical Sciences and Bioimages, “G. d’Annunzio” UniversityI.T.A.B. Institute for Advanced Biomedical Technologies, G. D‘Annunzio University FoundationDepartment of Clinical Sciences and Bioimages, “G. d’Annunzio” UniversityI.T.A.B. Institute for Advanced Biomedical Technologies, G. D‘Annunzio University FoundationDepartment of Clinical Sciences and Bioimages, “G. d’Annunzio” UniversityI.T.A.B. Institute for Advanced Biomedical Technologies, G. D‘Annunzio University FoundationDepartment of Clinical Sciences and Bioimages, “G. d’Annunzio” UniversityDepartment of Neurology, Washington University School of MedicineI.T.A.B. Institute for Advanced Biomedical Technologies, G. D‘Annunzio University FoundationWe used magneto-encephalography (MEG) to measure visually evoked activity in healthy volunteers performing saccadic eye movements to visual targets. The neuromagnetic activity was analyzed from regions of cortical activation identifi ed in separate functional magnetic resonance imaging (fMRI) studies. The latency of visual responses signifi cantly increased from the Middle Temporal region (MT+) to the Intraparietal Sulcus (IPS) to the Frontal Eye Field (FEF), and their amplitude was greater in the hemisphere contralateral to the visual target. Trial-to-trial variability of oculomotor reaction times correlated with visual response latency across cortical areas. These results support a feedforward recruitment of oculomotor cortical centers by visual information, and a model in which behavioral variability depends on variability at different neural stages of processing.http://journal.frontiersin.org/Journal/10.3389/neuro.09.001.2007/fullSaccadesfMRIMEGreaction time variabilityvisual latency |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Carlo Sestieri Carlo Sestieri Vittorio Pizzella Vittorio Pizzella Francesco Cianflone Francesco Cianflone Gian Luca Romani Gian Luca Romani Maurizio Corbetta Maurizio Corbetta Maurizio Corbetta |
spellingShingle |
Carlo Sestieri Carlo Sestieri Vittorio Pizzella Vittorio Pizzella Francesco Cianflone Francesco Cianflone Gian Luca Romani Gian Luca Romani Maurizio Corbetta Maurizio Corbetta Maurizio Corbetta Sequential activation of human oculomotor centers during planning of visually-guided eye movements: a combined fMRI-MEG study. Frontiers in Human Neuroscience Saccades fMRI MEG reaction time variability visual latency |
author_facet |
Carlo Sestieri Carlo Sestieri Vittorio Pizzella Vittorio Pizzella Francesco Cianflone Francesco Cianflone Gian Luca Romani Gian Luca Romani Maurizio Corbetta Maurizio Corbetta Maurizio Corbetta |
author_sort |
Carlo Sestieri |
title |
Sequential activation of human oculomotor centers during planning of visually-guided eye movements: a combined fMRI-MEG study. |
title_short |
Sequential activation of human oculomotor centers during planning of visually-guided eye movements: a combined fMRI-MEG study. |
title_full |
Sequential activation of human oculomotor centers during planning of visually-guided eye movements: a combined fMRI-MEG study. |
title_fullStr |
Sequential activation of human oculomotor centers during planning of visually-guided eye movements: a combined fMRI-MEG study. |
title_full_unstemmed |
Sequential activation of human oculomotor centers during planning of visually-guided eye movements: a combined fMRI-MEG study. |
title_sort |
sequential activation of human oculomotor centers during planning of visually-guided eye movements: a combined fmri-meg study. |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Human Neuroscience |
issn |
1662-5161 |
publishDate |
2008-03-01 |
description |
We used magneto-encephalography (MEG) to measure visually evoked activity in healthy volunteers performing saccadic eye movements to visual targets. The neuromagnetic activity was analyzed from regions of cortical activation identifi ed in separate functional magnetic resonance imaging (fMRI) studies. The latency of visual responses signifi cantly increased from the Middle Temporal region (MT+) to the Intraparietal Sulcus (IPS) to the Frontal Eye Field (FEF), and their amplitude was greater in the hemisphere contralateral to the visual target. Trial-to-trial variability of oculomotor reaction times correlated with visual response latency across cortical areas. These results support a feedforward recruitment of oculomotor cortical centers by visual information, and a model in which behavioral variability depends on variability at different neural stages of processing. |
topic |
Saccades fMRI MEG reaction time variability visual latency |
url |
http://journal.frontiersin.org/Journal/10.3389/neuro.09.001.2007/full |
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