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Abstract #2160

Somatotopic Mapping of Individual Fingers with a Novel Vibrotactile Stimulator Using BOLD FMRI at 3T

Sunil K. Valaparla1, 2, Hsiao-Ying (Monica) Wey1, 2, William E. Rogers1, Jinqi Li1, Geoffrey D Clarke2, Timothy Q. Duong1, 2

1Research Imaging Institute, University of Texas Health Science Center San Antonio, San Antonio, TX, United States; 2Radiology, University of Texas Health Science Center San Antonio, San Antonio, TX, United States

High resolution mapping of somatotopy remains an active area of research. In this study, we: i) designed and constructed a MRI-compatible stimulator working on magneto-mechanical principles that is applicable for a wide-range of stimulation frequencies, ii) implemented high-resolution fMRI studies with 1.5 mm isotropic resolution to map human finger somatosensory cortex (S1), iii) mapped out the tuning curve as a function of stimulation frequency, and iv) applied the optimal conditions to map finger somatotopy.

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Keywords

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