A, schematic diagram illustrating Rotarod assay. B, motor performance of weanlings in an accelerating Rotarod assay conducted in 4 trials (T1–T4) over 4 days of testing (D1–D4) is indistinguishable between WT (black circles) and SCA684Q/84Q mice (orange squares, day 4, WT: 73.75 ± 9.83 s, n = 10; SCA684Q/84Q: 77.90 ± 10.77 s, n = 10, Student's t test, P = 0.77).