Fig 8. Radius of curvature increases with of stimulus amplitude, but not duration.

Results are shown for bipolar VCS (left); CCS (center); and variable durations (right). Red and black color-code stimulus frequencies of 50 Hz and 200 Hz, respectively. Bulls eye markers indicate the median, and bars cover the 25–75th percentile. Variable amplitude tests had constant T _stim = 1.5 s, while variable duration tests were done with constant 3V, 50 Hz.