<p>A. Overall visit frequency. B. Mean path length. C. Percent alternations (Data for this measure were not collected at 16 weeks of age since R6/2 mice were not tested in this protocol due to reduced licking). *Significant HD genotype differences within each light phase, at each age; #: significant differences due to light phase in the diurnal cycle in the WT mice; ##significant differences due to light phase in the cycle for each age independently of genotype; ###significant differences due to light phase in the diurnal cycle in the R6/2 mice; ∧significant TG2 genotype differences. WT: wild-type, TG2+/−: heterozygous TG2 knockout, TG2−/−: homozygous TG2 knockout.</p
