منابع مشابه
Detection of eye movements from fMRI data.
Awake humans make eye movements with amplitudes and frequencies that depend on behavioral state and task. This poses two problems for functional magnetic resonance imaging (fMRI) studies that compare brain activity across tasks. First, motion of the eye in the orbit increases the variance of the MR signal in adjacent regions of the orbitofrontal cortex, hampering activation detection. Second, e...
متن کاملMonitoring eye movements during fMRI tasks with echo planar images.
Verifying task compliance during functional magnetic resonance imaging (fMRI) experiments is an essential component of experimental design. To date, studies of oculomotor tasks such as smooth pursuit eye movements have either measured task performance outside the magnet and assumed similar performance during functional neuroimaging, or have used MR-compatible eye movement recording devices, whi...
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When the eyes are blinked or opened and closed, involving vertical movements of the eyes, potential changes can be cobtained from neighboring structures. Recorded by an electroencephalograph from frontal leads or leads close to the orbit they appear as two to four per second flat-topped waves having an amplitude of about 150 microvolts. This is a well-known phenomenon in electroencephalography;...
متن کاملEye Movements in Reading: Models and Data.
Models of eye movement control in reading and their impact on the field are discussed. Differences between the E-Z Reader model and the SWIFT model are reviewed, as are benchmark data that need to be accounted for by any model of eye movement control. Predictions made by the models and how models can sometimes account for counterintuitive findings are also discussed. Finally, the role of models...
متن کاملThe role of eye movements in a contour detection task.
Vision combines local feature integration with active viewing processes, such as eye movements, to perceive complex visual scenes. However, it is still unclear how these processes interact and support each other. Here, we investigated how the dynamics of saccadic eye movements interact with contour integration, focusing on situations in which contours are difficult to find or even absent. We re...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2003
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.10345