Space for thought: Representation of body boundaries and intellectual efficiency in children

Aim: The psychoanalytic theories of Bion, Anzieu, Berger and Gibello postulate that the development of thinking depends upon the formation of a psychic space. This thinking space has its origin in the body and in our interpersonal relations. This study aims to validate this psychodynamic hypothesis. Method: A group of 8- to 14-year-old children participated in this research. The presence of a thinking space was operationalized by the "barrier" and "penetration" scores on the Rorschach's Fisher and Cleveland scales and intellectual efficiency was measured using a short version of the WISC-IV. Results: Results show that extreme scores on the "barrier" and "penetration" variables predict a lower intellectual level than average scores on the same variables. Conclusion: The development of thinking and personality are undoubtedly linked and the "barrier" and "penetration" variables are useful measures when evaluating the development of a space for thought.

Integration of olfactory information in a spatial representation enabling accurate arm choice in the radial arm maze

The aim of the present study was to determine whether and how rats can use local olfactory cues for spatial orientation. Rats were trained in an eight-arm radial maze under different conditions as defined by the presence or absence of supplementary olfactory cues marking each arm, the availability of distant visuospatial information, and the illumination of the maze (light or darkness). The different visual conditions were designed to dissociate among the effects of light per se and those of visuospatial cues, on the use of olfactory cues for accurate arm choice. Different procedures with modifications of the arrangement of olfactory cues were used to determine if rats formed a representation of the spatial configuration of the olfactory cues and if they could rely on such a representation for accurate arm choice in the radial maze. The present study demonstrated that the use of olfactory cues to direct arm choice in the radial arm maze was critically dependent on the illumination conditions and implied two different modes of processing of olfactory information according to the presence or the absence of light. Olfactory cues were used in an explicit manner and enabled accurate arm choice only in the absence of light. Rats, however, had an implicit memory of the location of the olfactory cues and formed a representation of the spatial position of these cues, whatever the lighting conditions. They did not memorize the spatial configuration of the olfactory cues per se but needed these cues to be linked to the external spatial frame of reference.

The cells and peripheral representation of sodium taste in mice.

Salt taste in mammals can trigger two divergent behavioural responses. In general, concentrated saline solutions elicit robust behavioural aversion, whereas low concentrations of NaCl are typically attractive, particularly after sodium depletion. Notably, the attractive salt pathway is selectively responsive to sodium and inhibited by amiloride, whereas the aversive one functions as a non-selective detector for a wide range of salts. Because amiloride is a potent inhibitor of the epithelial sodium channel (ENaC), ENaC has been proposed to function as a component of the salt-taste-receptor system. Previously, we showed that four of the five basic taste qualities-sweet, sour, bitter and umami-are mediated by separate taste-receptor cells (TRCs) each tuned to a single taste modality, and wired to elicit stereotypical behavioural responses. Here we show that sodium sensing is also mediated by a dedicated population of TRCs. These taste cells express the epithelial sodium channel ENaC, and mediate behavioural attraction to NaCl. We genetically engineered mice lacking ENaCalpha in TRCs, and produced animals exhibiting a complete loss of salt attraction and sodium taste responses. Together, these studies substantiate independent cellular substrates for all five basic taste qualities, and validate the essential role of ENaC for sodium taste in mice.

Les parlementaires suisses entre démocratisation et professionnalisation (1910-2010). Biographie collective des élus fédéraux et réformes du Parlement helvétique

Notre travail de thèse vise à analyser, d'une part, les principales réformes du Parlement fédéral adoptées au cours du 20e siècle et, d'autre part, l'évolution du profil sociographique pour six cohortes d'élus fédéraux (1910, 1937, 1957, 1980, 2000 et 2010), sous l'angle de sa démocratisation et de sa professionnalisation. La thèse comprend trois axes de recherche principaux. Premièrement, nous nous penchons sur les deux réformes institutionnelles censées favoriser la démocratisation du recrutement parlementaire, à savoir l'adoption de la proportionnelle pour l'élection du Conseil national en 1918 et l'introduction du suffrage féminin à l'échelon fédéral en 1971. Nous abordons également les réformes du Parlement visant, depuis les années 1970, à sa revalorisation et à sa professionnalisation. Le deuxième axe porte sur la réalisation d'un portrait collectif des élus fédéraux pour la période 1910-1980, dans le but de vérifier l'impact des réformes des règles électorales (proportionnelle et suffrage féminin) sur le profil des députés et sénateurs. Enfin, dans le troisième axe, nous abordons les transformations du profil socio-professionnel des parlementaires pendant la période plus récente (1980-2010), en lien avec la professionnalisation accrue de l'Assemblée fédérale et les changements des rapports de force partisans. Nos résultats permettent de mettre en évidence plusieurs éléments de continuité (prédominance de la catégories des indépendants, notamment des avocats, des chefs d'entreprise et des agriculteurs, et sous-représentation des salariés du secteur public ; fort ancrage local), ainsi que certains facteurs de rupture (présence accrue des femmes, moindre importance de la carrière militaire). D'autres changements dans le profil sont liés au processus récent de professionnalisation, contesté et inachevé, qui a favorisé néanmoins l'émergence de nouveaux profils sociologiques d'élus, en termes de formation, de profession (apparition du groupe des parlementaires professionnels) et de cumul des mandats économiques et politiques, avec cependant de fortes variations entre les partis et entre les deux Chambres. - Our PhD thesis aims at analysing, on the one hand, the main reforms of the Federal Parliament adopted during the 20th century and, on the other hand, the evolution of sociographical profile for six cohorts of Swiss MPs (1910, 1937, 1957, 1980, 2000 and 2010) in terms of their democratization and professionalization. Our research is composed of three main parts. Firstly, we analyse two institutional reforms which intended to promote the democratization of parliamentary recruitment, namely the adoption of proportional representation (PR) in 1918 for the election of the National Council and the introduction of women's suffrage at the federal level in 1971. We also deal with parliamentary reforms that, since the 1970s, have aimed at reasserting the political status of the Federal Assembly and at professionalizing its members. Secondly, we carry out a collective biography of Swiss MPs during the period 1910-1980, in order to verify the impact of electoral reforms (PR and women's suffrage) on the profiles of deputies and senators. Finally, we discuss the transformation of the MPs' socio-_professional profiles during the recent period (1980-2010) in connection with the increased professionalization of the Federal Assembly and the changes of the power relations within the Parliament. Our results allow us to highlight several elements of continuity (the predominance of self-employed persons, especially lawyers, business managers and farmers, and the underrepresentation of public employees; stronger background in local politics), as well as some factors of discontinuity (increased presence of women and lesser importance of the military career). Other changes of the parliamentarians' profile are related to the recent process of professionalization. Although contested and unfinished, it has promoted new sociological profiles in terms of educational background, profession (growth of the professional parliamentarians) and number of political and economic mandates held simultaneously, however with important variations between parties and between Lower and Upper House.

Political representation in Switzerland : democratic or plutocratic ?

Les inégalités économiques se traduisent-elles dans des inégalités politiques à travers le processus de représentation électorale? Telle est la question centrale de cette thèse qui s'attache, par ailleurs, à investiguer les mécanismes qui tendent à produire une représentation biaisée des préférences politiques des citoyens en fonction de leur statut économique. Focalisé sur le cas de la Suisse et faisant usage des données de l'enquête postélectorale Selects de 2007, ce travail démontre que sur les rares sujets qui divisent les citoyens selon des clivages économiques - la redistribution des richesses et la sécurité sociale en particulier - les élus à l'Assemblée fédérale ont des préférences qui reflètent mieux les opinions des citoyens les plus riches. Cette sous-représentation des opinions des citoyens modestes et de ceux faisant partie du centre de la distribution des revenus peut en partie être attribuée à des différences dans les taux de participation et de connaissance politiques entre ces groupes de citoyens. La thèse met également en évidence le rôle joué par la représentation descriptive - autrement dit, la similitude en termes de statut économique entre les représentants et les représentés - dans la représentation des opinions et intérêts des citoyens. Par ailleurs, la structure du système partisan en Suisse ne reflétant pas la multidimensionnalité des préférences politiques des citoyens, les électeurs ne parviennent pas à traduire la complexité de leurs préférences politiques dans un choix de vote, ce qui, dans la configuration actuelle des forces politiques, tend à favoriser l'élection de représentants aux opinions proches de la droite sur les questions économiques. Enfin, une analyse de la représentation politique au niveau cantonal tend à soutenir la thèse selon laquelle le manque de régulation en matière de financement des partis en Suisse pourrait partiellement expliquer les inégalités dans la représentation des opinions politiques des citoyens aux revenus distincts. - Do economic inequalities translate into political inequalities through electoral representation? This is the central research question of this thesis, which also investigates the mechanisms that lead to potential economically based inequalities in the representation of citizens' policy preferences. Focusing on the case of Switzerland and making use of data provided by the post- electoral survey Selects 2007, this research demonstrates that regarding the rare policy domains in which the preferences of citizens are clearly linked to economic cleavages - redistribution and social security in particular - members of the Federal Assembly have policy preferences that best reflect the policy preferences of richer citizens. The under-representation of the opinions of relatively poor citizens and of those being the in the middle of the income distribution can be to some extent be explained by differences in political participation and political information across income groups. The thesis also puts forward the role played by descriptive representation - the similarity between representatives and represented in terms of their socioeconomic status - for the representation of citizens' preferences and interests. In addition, the structure of the party system in Switzerland does not reflect the multidimensionality of policy preferences among citizens who, as a result, have a hard time translating their complex preferences into a vote choice. Given the configuration of political actors, this tends to favour the election of representatives from the right who do not represent the preferences of their voters on economic issues. Finally, an analysis of representation at the cantonal level tends to confirm that the lack of party finance regulations in Switzerland may partially explain inequalities in the representation of citizens with different levels of income.

Somatosensory motor bodily representation cortical thinning in Tourette : effects of tic severity, age and gender

Introduction: Tourette syndrome (TS) implicates the disinhibition of the cortico-striatal-thalamic-cortical circuitry (CSTC). Previous studies used a volumetric approach to investigate this circuitry with inconsistent findings. Cortical thickness may represent a more reliable measure than volume due to the low variability in the cytoarchitectural structure of the grey matter. Methods: 66 magnetic resonance imaging scans were acquired from 34 TS (age range 10-25, mean 17.19±4.1) and 32 normal controls (NC) (age range 10-20, mean 16.33±3.56). Brain morphology was assessed using the fully automated Civet pipeline at the Montreal Neurological Institute. Results: We report (1) significant cortical thinning in the fronto-parietal and somatosensory-motor cortices in TS relative to NC (p<0.05); (2) TS boys showed thinner cortex relative to TS girls in the fronto-parietal cortical regions (p<0.05); (3) significant decrease in the fronto-parietal mean cortical thickness in TS with age relative to NC and in the pre-central cortex in TS boys relative to TS girls; (4) significant negative correlations between tic severity and the somatosensory-motor cortical thickness. Conclusions: TS revealed important thinning in brain regions particularly involved in the somatosensory/motor bodily representations which may play an important role in tics. Our findings are in agreement with Leckman et al. (1991) hypothesis stating that facial tics would be associated with dysfunction in an orofacial subset of the motor circuit, eye blinking with the occulo-motor circuit, whereas lack of inhibition to a dysfunction in the prefrontal cortex. Gender and age differences may reflect differential etiological factors, which have significant clinical relevance in TS and should be considered in developing and using diagnostic and therapeutic interventions.