Sleep parameters recorded, in both genotypes, at 11 (4 wt and 6 R6/1 mice) and 16 weeks (4 wt and 5 R6/1 mice) of age.

Mean episode duration (A, D), number (B, E) and total percent time spent (C, F) in waking (W), slow wave sleep (SWS) and REM sleep (REM) in both light and dark cycles. * R6/1 mice significantly different from age-matched WT littermates at p<.05 by Mann-Whitney test.