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.Full text not available from this repository.
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 or Research Centre:||Birkbeck Schools and Research Centres > School of Science > Psychological Sciences|
|Date Deposited:||16 Dec 2010 11:22|
|Last Modified:||17 Apr 2013 12:19|
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