Fig. 6.

On y-axis proposed measure n, the number of bouts of a state conditional on the previous state, for each mouse by strain. (a) Gives n for REM followed from NREM; (b) is left empty, i.e., REM following from WAKE; (c) gives n for NREM followed from REM; (d) gives n for NREM followed from WAKE; (e) gives n for WAKE followed from REM; (f) gives n for WAKE followed from NREM. Means for each strain are indicated by the horizontal black line and standard errors by the vertical bars.