Figure 1From: A QTL on mouse chromosome 12 for the genetic variance in free-running circadian period between inbred strains of mice Raster actograms of locomotor activity of representative mice of the B6 and AhR strains. Locomotor activity was monitored by infrared motion detectors. Each line of recorded activity is 48 hr. Each pair of days is plotted beneath the previous pair of days. Activity is indicated by the height of the narrow histograms each 10 min wide.Back to article page