Daytime sleep is selectively affected in Q175 mutants.

<p><b>A.</b> Average waveforms of hourly sleep in WT, Q175 Het and Hom mice at 9 months (top) and 12 months of age (bottom). <b>B.</b> Amount of time spent in sleep in day is selectively decreased compared to night-time sleep in Q175 Hom mice at 9 (top) and 12 months of age (bottom). <b>C.</b> 9 (top) and 12 month (bottom) old Q175 Hom mice have more fragmented daytime sleep, with increased number of sleep episodes. <b>D.</b> Sleep episodes in Q175 Hom mice are also shorter in duration. * indicates significant difference (<i>P</i><0.05) between WT and Q175 Hom mice and ^∧ indicates differences (<i>P</i><0.05) between Q175 Het and Hom mice.