Three dimensional model of the male cat urethra and surrounding structures. The sensory branch of the pudendal nerve splits into proximal (cranial sensory nerve, CSN) and penile (dorsal nerve of the penis, DNP) branches. The nerve locations shown were used for calculating the activating function and were not physically included in the finite element model. The model was encased in a cylinder and bounding box (not shown) to allow for finer element sizes around the model components and larger elements near the outer boundaries. Scale = 1 cm at prepuce.