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Realistic FEM Models for Electrode Design Optimization

 

Fine Model

Selectively stimulating different muscles innervated by the femoral nerve with a single, multicontact electrode


The long-term goal of our research is to restore standing function via selective activation of target fascicles in the femoral nerve by a flat interface nerve electrode (FINE). The optimal number and location of contacts within a FINE had not been determined previously. A realistic threedimensional finite element model based on a cross section of human femoral nerve and FINE is presented. Simulated voltages are applied as an extracellular field to the MRG double-cable axon model. Initial simulations indicate that optimal contacts may exist for each fascicular group but an acceptable selectivity may require nerve reshaping.

Ref: Schiefer, M., R. Triolo, D.J. Tyler, (2008) “A Model of Selective Activation of the Femoral Nerve with a Flat Interface Nerve Electrode for a Lower Extremity NeuroprosthesisIEEE Trans Neural Eng and Rehab, 16(2), 195-204 (Cover).