Effects of <i>parkin</i> genetic deletion on the spatial memory performance.

<p>(A) total investigation time by wild-type and <i>parkin</i>^−/− mice during the training session. (B) Recognition index of wild-type and <i>parkin</i>^−/− mice during the test session. <i>*P</i><0.05 compared to the hypothetical 50% (random investigation). <i>^#P</i><0.05 compared to the wild-type control group. Data are mean ± s.e.m. of n = 9–10 per group.