Boxplots of the EI measured in different postmortem brain structures. When only one sample was available, the value is plotted as one horizontal line instead of a boxplot. Fetal brain samples were available for SCA1, SCA3, and SCA7 and have the most stable repeat compared to the adult brain. Pathology and number for each individual is indicated at the bottom (matching data for each individual is available inTable 1). t1, first visit; t2, second visit; t3, third visit; t4, fourth visit.
