期刊
MAGNETIC RESONANCE IN MEDICINE
卷 69, 期 4, 页码 1194-1199出版社
WILEY-BLACKWELL
DOI: 10.1002/mrm.24330
关键词
plantar; somatosensory; gait; feedback; pneumatic
资金
- National Natural Science Foundation of China [31150110173]
- Fundamental Research Funds for the Central Universities, China
- Harvard Catalyst [1KL2RR025757-04]
- NIH [KL2 RR 025757]
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. (C) 2012 Wiley Periodicals, Inc.
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