Three-dimensional reconstruction and finite element modeling for electrical stimulation of human brainstem

Topographical and three-dimensional models of the brainstem segment including the cochlear nuclei were constructed employing computer aided design software. The geometric information was then utilized to construct a finite element model to describe the electric potential distribution in the area for monopolar stimulation. The model demonstrates the effects of ground electrode position on the electric field geometry. Placing the electrode further medial inside the lateral recess increased stimulation of the cochlear nuclear complex.