Figure 5.

Grand averages of short, middle and long range coherences obtained for POT (top) and CSD (bottom), respectively, for states WEC, lucid dreaming and REM sleep. Coherences are averaged across electrode pairs in 4-s epochs. Short-range (55 pairs) was defined as 3 - 10 cm, mid range (51 pairs) as 10–15 cm, and long-range (65 pairs) as > 15-cm interelectrode distance. Standard errors are indicated by vertical bars for short range coherences to facilitate data interpretation. Frequency resolution is 4 Hz. POT = scalp potentials; CSD = current source densities; WED = wake with eyes closed