FIGURE 14-21 Learning Effects on Hippocampal Volume After a 4-year course devoted to learning London’s street layout, trainees who qualified as licensed taxi drivers show increased gray matter volume in the most posterior part of the hippocampus (orange and yellow areas).

Republished with permission of Elsevier Science and Technology Journals, from Woollett, K. and Maguire, E.A. (2011) Acquiring “the knowledge” of London’s layout drives structural brain changes. Current Biology, 21, 2109–2114. Permission conveyed through Copyright Clearance Center, Inc.