It is now about 10 years since the first edition of Nerve Cells and Nervous Systems was published. There have been many important advances across the whole field of neuro science since 1990 and it was obvious that the first edition had become much less useful than when it was published. Hence this new edition. I have attempted to keep to the aims of the first edition by presenting the general principles of neuroscience in the context of experimental evidence. As with the first edition, the selection of material to include, or exclude, has been difficult and invariably reflects my personal...