Introduction: changing approaches to the neuronal analysis of behavioural choice, Jenny Kien et al. Part 1 Cellular bases of motor programme selection: modulatory control of multiple task processing in the stomatogastric nervous system, Eve Marder and James M.Weimann; control of egg-laying behaviour patterns in "Lymnaea stagnalis", Andrels ter Maat et al; motor programme selection and the control of feeding in the snail, Catherine R.McCrohan and Michael A.Kyriakides; mechanisms of behavioural selection in "Lymnaea stagnalis", William Winlow et al; to flex, swim or struggle? behavioural selection in "Xenopus" embryos, Stephen R.Soffe; many neurones in the "Aplysia" abdominal ganglion are active during the gill-withdrawal reflex, Chun Xiao Falk et al. Part 2 Distributed neural networks and motor programme selection: mechanisms of motor pattern switching in crickets stridulation and flight, R.Matthias Hennig; neural circuits for speed change in swimming fish, Barry Roberts and Willem Mos; decision-making in the insect nervous system - a model for selection and maintenance of motor programmes, Jenny Kien and Jennifer S.Altman; making behavioural choices with interneurones in a distributed system, William B.Kristan, Jr et al. Part 3 Selection of directed movements: control of goal-directed limb movements in primates - neurobiological evidence for parallel, distributed motor processing, Garrett E.Alexander and Michael D.Crutcher; premotor systems, attention to action and behavioural choice, Gary Goldberg; directed movement in the frog - spatial representation, motor choice, free will?, Paul Grobstein; deciding what to do next, Jenny Kien et al.
