Taking Selective Activation, from Rehka Chintalacharuvu’s modeling, onto the next level, animal experiments, Warren Grill began exploring the use of a self-sizing spiral cuff electrode with stimulating contacts spaced around the nerve at 90˚ increments. He developed the animal model, built a measurement device and laid the foundation for studies performed by graduate students who followed him.
Veraart C., W.M. Grill, and J.T. Mortimer, “Selective Control of Muscle Activation with a Multipolar Nerve Cuff Electrode”, IEEE Trans. Biomed. Engineering, vol 40, pp640-653,1993.
Grill, W.M. and J.T. Mortimer, Stimulus Waveforms for Selective Neural Stimulation”, IEEE Engineering in Medicine and Biology, vol 14, no. 4, pp375-385, 1995.
Grill, W.M., and J.T. Mortimer, “The effect of stimulus pulse duration on selectivity of neural stimulation”, IEEE Transactions on Biomedical Engineering, vol 43, No. 2, pp161-166. 1996.
Grill, W.M., and J.T. Mortimer, "Non-invasive measurement of the input-output properties of peripheral nerve stimulating electrodes.", J. of Neuroscience Methods, vol 65, pp43-50, 1996.
Grill, W.M., and J.T. Mortimer, “Quantification of recruitment properties of multiple contact cuff electrodes”, IEEE Transactions on Rehabilitation Engineering, Vol 4, no 2, pp 49-62, 1996.
Grill, W.M. and J.T. Mortimer, “Inversion of the Current-Distance Relationship By Transient Depolarization”, IEEE Transactions on Biomedical Engineering, Vol 44, no 1, pp 1-9, 1997.
Grill, W.M., and J.T. Mortimer, “Stability of the Input-Output Properties of Chronically Implanted Multiple Contact Nerve Cuff Electrodes”, IEEE Trans. on Rehabilitation Engineering, Vol 6, no 4 pp364-373. 1998.