The French Atlantic Littoral

There are no author-identified significant results in this report

Relations entre le niveau marin, les dépôts sédimentaires et la construction des digues dans la plaine maritime picarde

Comparaison of soils profiles gives a general view of the sedimentation in the Picardy Coastal Plain. The construction of sea-walls can be connected with the sea-level variations and with the population history (peace, wars, increase in population).La comparaison de coupes de terrain permet d'avoir une vue générale de la sédimentation dans la Plaine Mantime Picarde. La construction des digues à la mer peut être rattachée aux variations du niveau marin et à l'histoire des populations (paix ou guerres et accroissement démographique).Lefèvre P., Regrain R. Relations entre le niveau marin, les dépôts sédimentaires et la construction des digues dans la plaine maritime picarde. In: Bulletin de l'Association française pour l'étude du quaternaire, vol. 14, n°4, 1977. pp. 101-107

Impact of multi-task on symptomatic patient affected by chronical vestibular disorders

Purpose: After a vestibular deficit some patients may be affected by chronical postural instability. The aim of this study was to identify the emotional and cognitive factors of these symptomatic patients. In particular, the double cognitive task and the anxiety disorder were identified by our patients. Through a retrospective study, 14 patients (65.4 ±18 years) participated in the experiment. Method: The experimentation consists in the study of the standing position of our patients through the aggregate of the trajectories of the center of pressure (COP) using a force plate device. With the aim of isolating the emotional and cognitive influence, this experimentation was defined in two conditions. In the first one, the patients were asked to maintain their balance without additional tasks. In the second one, the patients were submitted to an additional cognitive arithmetic task. The stabilogram surface, length (the forward and backward displacement distance during deviations in COP), lateral and the antero-posterior deviations were assessed. Results: Our results showed an increase of postural instability of patients affected by chronical vestibular disorders when submitted to the double task. The patients submitted to the cognitive task present a larger surface of activity in comparison with the free-task one (Wilcoxon test p-value equals p = 0.0453). In addition, their displacements inside this area are more important (p = 0.0338). The COP of all our patients deviated forward in the presence of the double task. Conclusion: The increase in instability during the double cognitive task could be explained by an additional stress caused by the desire to make a success of the cognitive task