'The editors are to be congratulated for the originality of the subject and the authors for the commitment and care shown in writing these exhaustive chapters.' Trends in Pharmacological Sciences

• S.J. Cooper and C.T. Dourish: An introduction to the concept of stereotypy and a historical perspective on the role of brain dopamine; T.W. Robbins, G. Mittelman, J. O'Brien, and P. Winn: The Neuropsychological significance of stereotypy induced by stimulant drugs; J.L. Waddington, A.G. Molloy, K.M. O'Boyle, and M.R. Pugh: Aspects of stereotyped and non- stereotyped behaviour in relation to dopamine receptor subtypes; C.T. Dourish and S.J. Cooper: Neural basis of drug-provoked yawning; R.L. Issacson and W.H. Gispen: Neuropeptides and the issue of stereotypy in behaviour; G. Curzon: Stereotypical and other motor responses to 5-hydroxytryptamine receptor activation; P. Teitelbaum, S.M. Pellis, and T.L. DeVetti: Disintegration into stereotypy induced by drugs or brain damage: a microdescriptive behavioural analysis; A.K. Reid and J.E.R. Straddon: Mechanisms of schedule entrainment; C.D. Frith and D.J. Done: Stereotyped behaviour in madness and in health; A.J. Stoessl and S.M. Stahl: Stereotyped motor phenomena in neurological disease.