Extended Data Fig. 1: Pipeline procedures.

a–f, Summary of procedures involved in each step of the pipeline. g, Rig for parallel recording from six Neuropixels probes. Scale bar, 10 cm. h, Example retinotopic map used for targeting probes to six cortical visual areas. Scale bar, 1 mm. i, Image of Neuropixels probes during an experiment, with area boundaries from h overlaid in orange. Probe tips are marked with white dots. Scale bar, 1 mm. j, Box plot of the number of units recorded per area per experiment, after filtering based on ISI violations (<0.5), amplitude cutoff (<0.1) and presence ratio (>0.95) (see Methods and Extended Data Fig. 4 for quality metric definitions and distributions). Box plot edges represent upper and lower quartiles; centre line represents the median; whiskers represent 5th to 95th percentile range; open circles represent any data points beyond the edge of the whiskers. k, Histogram of the number of simultaneously recorded cortical and thalamic visual areas per experiment (n = 58 experiments).