Teaching in Cambridge proved to be refreshing and stimulated my wish to write a new version of my earlier book, Das menschliche Gehirn (Hippokrates Verlag Stuttgart, 1968), drawing upon my experience and accumulated teaching material. This new book attempts, as did an earlier one (Experimental Neurology, Clarendon Press, Oxford, 1961), a combination of morphological data with physiological and neurological studies.

Being primarily a morphologist rooted in the concept of the evolution of structure I have placed the emphasis on structural organisation, but functional aspects, experimental research and clinical findings have been incorporated, broadening the interest for clinical students and for students of neurobiology.

I wish to thank Professor R. J. Harrison, FRS for his offer of a base in his department from which I could take part in departmental teaching and continue my research, supported by the Deutsche Forschungsgemeinschaft; and Dr J. Herbert, Fellow of Gonville and Caius College, and Professor W. J. Macpherson, President of the College, for making mean Associate Member of the College, enabling me to teach some of their medical students. I also wish to thank students from Gonville and Caius College, in particular Pak-Lee Chau, David Evans, Diane Hopper, John Williams and Kwong-Wai Man for their help in various ways. My thanks to Petra Schuba for her great illustrative skill, to Mrs F. Glees for her secretarial help, to Tim Crane and Dennis McBrearty for their expert technical assistance and to Herr G. Koch, Gesellschaf t für wissenschaftliche Datenverarbeitung, Göttingen, for help with the index. I am indebted to the staff of Cambridge University Press, for their patience and linguistic support during the preparation of this book.