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- Title
Novel MRI-compatible tactile stimulator for cortical mapping of foot sole pressure stimuli with fMRI.
- Authors
Hao, Ying; Manor, Brad; Liu, Jing; Zhang, Kai; Chai, Yufeng; Lipsitz, Lewis; Peng, Chung‐Kang; Novak, Vera; Wang, Xiaoying; Zhang, Jue; Fang, Jing
- Abstract
Foot sole somatosensory feedback is critical to motor control and declines with aging and disease. To enable study of cortical networks underlying foot sole somatosensation, we developed a pneumatic tactile stimulator capable of producing one degree-of-freedom (DOF) oscillations with preset waveform, frequency (≤10 Hz), force magnitude (5-500 N), duty cycle (20-100%), and contacted surface area over which pressures are applied to the foot sole. Image tests (anatomical/functional/field map) of a phantom demonstrated that the device is compatible with 3 T MRI. Gradient-recalled echo-planar images of seven healthy young adults using a typical block-designed 1 Hz sinusoidal stimulation protocol revealed significant activation contralaterally within the primary somatosensory cortex and paracentral gyrus, and bilaterally within the secondary somatosensory cortex. The stimulation system may therefore serve as a research tool to study functional brain networks involved in the perception and modulation of foot sole somatosensation and its relationship to motor control. Magn Reson Med 69:1194-1199, 2013. © 2012 Wiley Periodicals, Inc.
- Publication
Magnetic Resonance in Medicine, 2013, Vol 69, Issue 4, p1194
- ISSN
0740-3194
- Publication type
Academic Journal
- DOI
10.1002/mrm.24330