Functional magnetic resonance imaging (fMRI) is a technique to measures brain activity. Since MRI uses strong magnetic fields around the head of the subject within a narrow tunnel, any device used concurrently with MRI must be free of ferromagnetic elements and not interactive with the magnetic field. In our lab, we are focusing on MRI environment compatible device development and capable of investigating the underlying neural mechanisms of human perception. Furthermore, we also applied our findings to the field of neurodegenerative disease early detection and treatment.