The Mutable Brain provides a comprehensive introduction to plasticity of the brain and neural circuits and covers the history of neurological research, from early work on the developing visual system, through to current state-of-the-art molecular techniques. Authored by leading researchers in the field, it addresses a range of research areas, including the behavioural significance of hippocampal plasticity, the mediation of avian vocal learning by neural plasticity and the dynamicity of the somatosensory system with its multi-hierarchical interactions. Together, these chapters provide a broad, introductory overview of current views on neuronal plasticity.