Bilateral electrolytic lesions of the lateral hypothalamus or intraventricular 6-hydroxydopamine injections produced substantial depletions of striatal dopamine in rats. All animals with brain damage showed marked sensorimotor impairments. However, they began to move and respond appropriately to environmental stimuli when placed in a sink of water, in a shallow ice bath, or among a colony of cats or rats. A reversal of the sensorimotor dysfunctions was still apparent shortly after the animals were removed from each activating situation. However, the therapeutic effects dissipated rapidly, and by 4 hr after an exposure the rats responded as poorly as they had prior to activation. These findings are strikingly similar to the "paradoxical kinesia" seen in parkinsonism, a clinical disorder attributed to degeneration of central dopamine-containing neurons. Collectively, they suggest the importance of activation in maintaining responsiveness to sensory stimuli in rats following dopamine-depleting brain lesions.

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This paper proposes a sociocultural perspective of mobility, of which migration is only one case, with a focus on mobile families. Consistent with mobility studies, sociocultural psychology of the lifecourse proposes to study both the sociocultural conditions of mobility, and the perspective of mobile people. In addition, in this article, we consider interrelated lives in mobility. We discuss the specific case of one family documented as part of a larger research project on repeated geographical mobility, and highlight the specificities of the context, the experiences of each family member, and some of their overlapping spheres of experiences. We thus hope to document the life of such families, but also to provide theoretical directions for the psychological study of mobility. Public Significance Statement This study examines the interrelated lives in families who move frequently internationally for professional reasons. It invites to pay a closer attention to the various members' distinct experiences of repeated mobility, and especially children's specific experiences. It also highlights the role of joint, transportable activities that may support a feeling of continuity and "home" for family members "on the move".