Visual stimulus presentation using fiber optics in the MRI scanner
Huang, R.S. and Sereno, Martin I. (2008) Visual stimulus presentation using fiber optics in the MRI scanner. Journal of Neuroscience Methods 169 (1), pp. 76-83. ISSN 0165-0270.
Imaging the neural basis of visuomotor actions using fMRI is a topic of increasing interest in the field of cognitive neuroscience. One challenge is to present realistic three-dimensional (3-D) stimuli in the subject's peripersonal space inside the MRI scanner. The stimulus generating apparatus must be compatible with strong magnetic fields and must not interfere with image acquisition. Virtual 3-D stimuli can be generated with a stereo image pair projected onto screens or via binocular goggles. Here, we describe designs and implementations for automatically presenting physical 3-D stimuli (point-light targets) in peripersonal and near-face space using fiber optics in the MRI scanner. The feasibility of fiber-optic based displays was demonstrated in two experiments. The first presented a point-light array along a slanted surface near the body, and the second presented multiple point-light targets around the face. Stimuli were presented using phase-encoded paradigms in both experiments. The results suggest that fiber-optic based displays can be a complementary approach for visual stimulus presentation in the MRI scanner.
|Keyword(s) / Subject(s):||fMRI, fiber optics, 3-D stimuli, peripersonal space, near-face space|
|School:||Birkbeck Schools and Departments > School of Science > Psychological Sciences|
|Date Deposited:||16 Dec 2010 11:22|
|Last Modified:||17 Apr 2013 12:19|
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