Abstract
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 videooculography 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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 58-65 |
| Number of pages | 8 |
| Journal | Neuroimage |
| Volume | 11 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2000 |
Funding
This work was supported by the McDonnell–Pew Program in Cognitive Neuroscience (D.R.G.), by NIH Grant NS30863-04 (M.M.M.), and by a NARSAD young investigator award (K.S.L.). We are grateful to Roger Ray for assistance with programming, to Oliver Josephs of the Wellcome Department of Cognitive Neurology (London, UK) and Josh Borah of ASL for critical technical assistance, and to Richard Niemczura and Terry Cunningham for assistance with image acquisition.
ASJC Scopus subject areas
- Neurology
- Cognitive Neuroscience