Brain-behavior relations across the lifespan: a commentary.

This final article provides an overview and commentary on some of the methods, findings and interpretations discussed in the preceding papers. Some major commonalities among them are highlighted and possible questions for future research projects are suggested. Topics discussed include plasticity, compensation and dedifferentiation, representation and control, memory and learning-all considered under the general heading of brain-behavior relations, and how they change across the lifespan.