Figure 2.

Peristimulus histograms showing individual cases of different types of short-latency visually evoked responses in the STN. The dashed vertical line indicates the onset time of the visual stimulus. The n associated with each histogram indicates the number of cases exhibiting that class of response; total n = 13. a, Short-latency (<70 ms), very-short-duration (10–15 ms) response. b, Short-latency (<70 ms), but slower-onset and longer-duration (∼400 ms) response. c, A combination of response classes a and b; d, A longer-duration (700–800 ms) response with latency >100 ms.