NeuroNexus ECoG grids (E32-300-20-50) were implanted on rat motor cortex for stimulation experiments. The grid layout enabled testing of a variety of stimulation parameters using both single and multiple electrode sites in different configurations. Recordings of cortical responses to stimulation were made with optical imaging through the ECoG grid. The results from Long Liu et al. at Zhejiang University provide experimental data for configuring therapeutic motor cortex stimulation.