Nigel H. Lovell

TL;DR: The results suggest that for subretinal vision prostheses short pulses are preferable for efficacy and safety considerations, and that direct activation of RGCs will be necessary for reliable activation during high-frequency stimulation.

TL;DR: In this investigation, seven levels of workload were induced using an arithmetic task, and the entropy of wavelet coefficients extracted from EEG signals is shown to distinguish all seven levels, suggesting increased synchronization of neural responses for higher load levels.

TL;DR: Results show that spatial resolution is impaired with increased distance from the electrode array to the target cells, and can be partly compensated by non-monopolar electrode configurations and larger electrode diameters, albeit at the expense of lower pixel densities due to larger covering areas by each stimulation electrode.

TL;DR: It is shown that in the Beeler-Reuter case, all ionic currents may be reasonably reconstructed using an experimental design consisting of action potential recordings perturbed by pseudo-random injection currents, indicating that by appropriate experimental design, it may be possible to infer the properties of underlying membrane currents from observation of transmembrane potential waveforms perturbedBy pseudo- random currents.

TL;DR: This work systematically evaluated the effectiveness of varying a range of stimulus parameters and electrode geometry for a suprachoroidal electrode array, using cortical evoked responses to monopolar electrical stimulation in cats, and found that the combination of monopolar stimulation with large diameter electrodes, wide pulse widths and parallel stimulation minimized the voltage requirements for stimulation.