Fmri compatible mechatronic ankle device

• Online Access: http://hdl.handle.net/2047/d10012916

The cutting-edge technique of functional magnetic resonance imaging (fMRI) is an invaluable tool in the fields of research and rehabilitation, used to generate images of the cortical response associated with certain physical actions. While devices have been utilized with great success in many upper extremity studies, there are presently no such devices designed for use with the foot and ankle. To this end, this paper proposes an apparatus consisting of a foot-pedal interface whose rotation is translated linearly via slidercrank mechanism. The design is such that it allows for both isometric and dynamic functionality, and capably measures force output, rotational frequency, and position. Results of finite element analysis (FEA) indicate that the MRI compatible parts and components chosen are capable of withstanding 100 lbs of force, which has been determined to be more than adequate for its intended use. The implementation of a mechanical actuator and a resistance system has been identified as a future improvement that would increase both the overall functionality of the device and the number of potential users.