Detailed description of datasets.

aDG – Drifting grating. b2x – 2 spatially offset gratings were presented, of the indicated size. This was done when the direction of gaze of the two eyes was different. Each grating covered the receptive fields in one eye. cFix – Fixed. dRan – Random. eSG – Static grating. fNA – Not applicable. The table describes the stimulus parameters for each dataset as well the total number of simultaneously recorded units after spike sorting (where units refer to both single units and multiunit activity consisting of small clusters of cells), the number of tuned cells and the number of onset detectors. The number of tuned cells corresponds to the number of cells for which the modulation amplitude of the first spike latency tuning curve, B, was larger than 15 ms for all stimulus conditions. The number of onset detectors corresponds to the cells that had both B<15 ms and spontaneous rate smaller than 5 spks/sec.