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Ventricular system volumes according to CAG triplet expansion. This figure compares the volumes in three groups of individuals with different CAG triplet expansions: ≤26 (normal), 27–35 (intermediate), and >40 (full penetrance). The evaluated structures include the 4th ventricle (A) and supratentorial ventricle (B). The p values indicate the statistical significance of the observed differences: (*** p < 0.00001, **** p < 0.000001).
