High Resolution fMRI for Finger Somatotopic Mapping at 3T using a Novel Vibrotactile Stimulator

Hsiao-Ying Wey^1,2, Sunil K. Valaparla^1,2, Timothy Q. Duong^1,2

This study described the development of a novel magneto-driven, MRI-compatible, vibrotactile stimulator. We implemented high-resolution fMRI studies with 1 mm isotropic resolution to map finger somatotopy. In addition, a frequency-response curve for the flatter tactile sensation (5-50 Hz) was explored while investigating vibration sensation is also possible. This study established a simple device and high-resolution protocol for future neuroscience applications exploring the somatosensory system with sophisticated experimental design.