Table 1 Variability of vascular surges (VS) events across animals

From: Local hippocampal fast gamma rhythms precede brain-wide hyperemic patterns during spontaneous rodent REM sleep

Animal # REM episodes # VS events Duration (s) Mean intensity (%) Max intensity (%) Mean activity ratio (%) Maximal activity ratio (%)
Rat 1 6 28 9.67 ± 7.87 25.01 ± 3.88 31.54 ± 8.32 61.2 ± 5.9 68.4 ± 9.5
Rat 2 6 26 13.27 ± 16.00 25.50 ± 3.69 31.72 ± 8.58 61.9 ± 5.6 68.8 ± 8. 7
Rat 3 8 25 5.12 ± 1.64 34.82 ± 6.00 41.05 ± 8.53 59.9 ± 3.1 66.8 ± 4.7
Rat 4 6 24 8.24 ± 7.59 23.16 ± 5.00 29.12 ± 8.19 62.9 ± 5.8 71.4 ± 8.5
Rat 5 12 55 11.60 ± 12.84 30.09 ± 9.83 39.18 ± 15.81 65.0 ± 7.1 74.6 ± 9.6
Mean 7. 6 31. 6 9.58 ± 9.19 27.72 ± 5.68 34.52 ± 9.89 62.2 ± 5.5 70.0 ± 8.2
  1. For each animal we display the number of vascular surges and REM episodes and counted the mean and standard-deviation of five parameters including: duration of VS, mean and maximum surge intensity (in % CBV), mean and maximum active pixels ratio (in % of active pixels). The surge intensity is computed by averaging the CBV over all brain pixels for the whole VS duration. The activity ratio is computed by counting the number of active pixels (that is the number of pixels that cross the activity threshold as defined in Supplementary Fig. 2 and Methods). Although VS events show some intrinsic variability (in terms of duration for instance), these five parameters are very consistent across animals. We excluded two animals for which the total number of VS events was too low (lower than 5)