Figure 2
From: V1 neurons respond to luminance changes faster than contrast changes
Time course of responses of V1 neurons to simultaneously changing luminance and contrast.
(a–d) Luminance response functions of four neurons at four contrast levels (0%, 30%, 60% and 90%) in 5 ms intervals. Neurons in (a–c) displayed the early responses (approximately 25–35 ms) to luminance changes of uniform stimuli (C = 0% contrast), while the neuron in (d) did not. The early responses of neurons in (a,b) preferred luminance decrements, while the neuron in (c) preferred luminance increments. The numerals at the top of each panel indicate the elapsed time after stimulus onset and the luminance response functions below were calculated at these time points. Neurons in (a,b,d) were complex cells, while the neuron in (c) was a simple cell. C: contrast (%).
