The nonlinearity investigation between stimulation duration and HRFs in primary visual cortex
碩士 === 國立臺灣大學 === 電機工程學研究所 === 97 === Hemodynamic responses to visual stimulation were assessed for nonlinearity in short stimulation duration. Four stimulation durations were used (1, 2, 4, and 8 sec), and 9 subjects were scanned to verify the nonlinear BOLD responses in visual cortex. The test o...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Others |
| Language: | en_US |
| Published: |
2008
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| Online Access: | http://ndltd.ncl.edu.tw/handle/82436820778079466796 |
| Summary: | 碩士 === 國立臺灣大學 === 電機工程學研究所 === 97 === Hemodynamic responses to visual stimulation were assessed for nonlinearity in short stimulation duration. Four stimulation durations were used (1, 2, 4, and 8 sec), and 9 subjects were scanned to verify the nonlinear BOLD responses in visual cortex. The test of nonlinearity consisted of using BOLD responses due to short stimulation durations to predict responses due to long stimulation durations. The results show the hemodynamic response is nonlinear for stimulation duration less than 4 sec in the visual cortex. In addition, the shape of hemodynamic response function influenced by the choice of region-of-interest was discussed.
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