Figure 5

Correlation between sleep onset latency (SOL) and distal–proximal skin temperature gradient (DPG) in the (a) sham condition and (b) warming conditions. X axis represents the DPG just before the sleep period. n.s.; not significant.
Correlation between sleep onset latency (SOL) and distal–proximal skin temperature gradient (DPG) in the (a) sham condition and (b) warming conditions. X axis represents the DPG just before the sleep period. n.s.; not significant.