Le Travail Humain 2008/4 Vol. 71, 2008/4 - pagesPages 297 to 322Defining Instrumental Support for Hospital Crisis Management: Example of the French "Plan Blanc"By S. Molenda, S. Hamek, Françoise AnceauxPages 323 to 357Analysis of Contextual Information Sharing in Cooperative and Competitive Sports InteractionBy Germain Poizat, Carole Sève, Guillaume Serres, Jacques SauryPages 359 to 384Road Rage and Ways of Expressing it: Existing Links with Reported ViolationsBy Arnaud Villieux, Patricia DelhommePages 385 to 404Neurophysiologic Mechanisms of Voluntary Movement: A Basis for Understanding GestureBy Clarisse Gaudez, Michel Aptel