Figure 2.

Topographical maps of the parameters of Process S in eight individuals. Estimations were based on normalized data (see Methods). Left to right: Increasing time constant τi, decreasing time constant τd, distance between upper and lower asymptote (UA-LA), mean SWA in NREM sleep (stages 2-4) of the first 7 h 27 min of baseline sleep (SWABL), and goodness of fit R2. Each map was scaled separately between minimal and maximal values. At the top right of the maps, maxima (max) and minima (min) of the maps are indicated.

Rusterholz and Achermann BMC Neuroscience 2011 12:84   doi:10.1186/1471-2202-12-84
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