Real-time monitoring of eye movements using infrared video-oculography during functional magnetic resonance imaging of the frontal eye fields.

Journal Article

Monitoring eye movements is a critical aspect of experimental design for studies of spatial attention and visual perception. However, obtaining online eye-movement recordings has been technologically difficult during functional magnetic resonance (MR) imaging studies. Previous approaches to monitoring eye movements either have distorted the MR images or have shown MR-related interference in the recordings. We report a technique using long-range infrared video-oculography to record eye movements without causing artifacts in the MR images. Analysis of the MR signal from a phantom obtained with the eye-movement equipment turned on or off confirmed the absence of significant additional noise in the MR time series. Eye movements of three subjects were monitored while they performed tasks of covert and overt shifts of spatial attention. Activation of the frontal eye fields during the covert task was seen even when the eye-movement recordings demonstrated no significant difference in saccadic eye movements between the baseline and the active conditions.

Full Text

Duke Authors

Cited Authors

  • Gitelman, DR; Parrish, TB; LaBar, KS; Mesulam, MM

Published Date

  • January 2000

Published In

Volume / Issue

  • 11 / 1

Start / End Page

  • 58 - 65

PubMed ID

  • 10686117

International Standard Serial Number (ISSN)

  • 1053-8119

Digital Object Identifier (DOI)

  • 10.1006/nimg.1999.0517

Language

  • eng

Conference Location

  • United States