From rat sexual behavior to schizophrenia: a tribute to Professor Emeritus Knut Larsson.

In July of 2002 Knut Larsson celebrated his 80th birthday. He could by then have looked back at a long and distingusihed career in the field of biological psychology. His research on sexual behavior had contributed to a basic understanding of many behavioral, endocrine and neural phenomena associated with or underlying sexual activity. Instead of looking back at his past achievements, Knut has preferred to look forward, constantly trying to find ways to stimulate interest in his own field and in biological psychology in general. This issue is a humble contribution to the noble end of enhancing the standing of biological psychology, particularly in Scandinavia. Foremost, however, it is a homage to a man of outstanding vision and intellectual integrity: Knut Larsson.