Motor function in the elderly: evidence for the reserve hypothesis. Elbaz, A.; Vicente-Vytopilova, P.; Tavernier, B.; Sabia, S.; Dumurgier, J.; Mazoyer, B.; Singh-Manoux, A.; Tzourio, C.. Neurology. 2013; 417-26: p.417-26. doi:10.1212/WNL.0b013e31829d8761Article