Skip to main content
. Author manuscript; available in PMC: 2014 Oct 1.
Published in final edited form as: J Neural Eng. 2013 Aug 28;10(5):10.1088/1741-2560/10/5/056013. doi: 10.1088/1741-2560/10/5/056013

Figure 2.

Figure 2

Single-electrode threshold experiments. (a) Probability of stimulus detection is plotted as a function of stimulus current (monkey K). The numbers along the curve indicate the number of times the monkey reported detection (numerator) and the total number of trials at that current (denominator). There were 31 out of 182 false alarms (no stimulation, 0 current), and nearly 100% hit rate for currents above 10 μA. Threshold (50% response rate) for this electrode was 9 μA. The data were normalized and fitted with a sigmoid as described in the methods. (b) Distribution of detection threshold for all tested electrodes for monkey P. This includes only those electrodes with a significant response at 40 μA. (c) Thresholds for monkey K, including those in the early data set KE (blue) and those retested in the later dataset KL (red).