A, top, recordings were made from Purkinje cells from cerebellar slices from weanling (P21–24) mice. Bottom, sample recordings showing only 1 climbing fibre innervating both P22 WT (left) and SCA684Q/84Q (right) Purkinje cells. Properties of EPSCs were not significantly different (see Table 2). B, bar graph showing distribution of Purkinje cells from WT (black) and SCA684Q/84Q (orange) mice that are innervated by 1, 2, 3, or more climbing fibres (CF). Most WT and SCA684Q/84Q Purkinje cells are innervated by 1 climbing fibre; distributions not significantly different; Mann–Whitney U test, P = 0.79.