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<dc:title xml:lang="en">Medial forebrain bundle deep brain stimulation in a rodent model of depression : modulation of sleep abnormalities and mechanisms of anti-depressant effects</dc:title>
<dcterms:alternative xml:lang="fr">Stimulation profonde du faisceau médian du télencéphale dans un modèle de dépression chez le rongeur : modulation des anomalies du sommeil et mécanismes des effets antidépresseurs</dcterms:alternative>
<dc:subject xml:lang="fr">Dépression</dc:subject>
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<dc:subject xml:lang="fr">Stimulation cérébrale profonde</dc:subject>
<dc:subject xml:lang="fr">Dopamine</dc:subject>
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<dc:subject xml:lang="fr">Oscillations gamma</dc:subject>
<dc:subject xml:lang="en">Depression</dc:subject>
<dc:subject xml:lang="en">Medial forebrain bundle</dc:subject>
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<dcterms:abstract xml:lang="fr">La dépression est un état complexe dont les symptômes variés comprennent des troubles du sommeil, pour lequel les traitements conventionnels sont inadéquats pour une minorité importante de patients. La stimulation cérébrale profonde (DBS) du faisceau médian du cerveau antérieur (MFB) représente un traitement prometteur pour ces patients. L'objectif de cette thèse était d'étudier les effets de la MFB-DBS sur le sommeil et la physiologie, en utilisant des méthodes comportementales, électrophysiologiques, moléculaires et neurochimiques chez le FSL rat modèle de dépression. Après avoir identifié des déficits du sommeil lent dans ce modèle, nos résultats suggèrent des modulations des oscillations gamma pendant le sommeil, la transmission dopaminergique et la plasticité neuronale comme mécanismes thérapeutiques potentiels de la MFB-DBS. En explorant ces effets, ce travail fournit un aperçu de ce traitement prometteur et élargit notre compréhension générale des mécanismes antidépresseurs.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Depression is an incompletely understood mental health condition with a range of symptoms including sleep disturbances, for which conventional treatments are inadequate for a substantial minority of patients. Deep brain stimulation (DBS) of the medial forebrain bundle (MFB) represents a promising new treatment modality for these patients. The aim of this thesis was to investigate the effects of 24h MFB-DBS in terms of sleep and physiology, utilising behavioural, electrophysiological, molecular and neurochemical methods in the Flinders Sensitive Line rat model of depression. After identifying previously unreported deficits in slow wave sleep in the model, our results suggested changes to gamma oscillations during sleep, modulation of dopaminergic transmission and plastic mechanisms as potential therapeutic mechanisms of MFB-DBS. By exploring these effects, this work provides insight into this promising treatment and broadens our general understanding of anti-depressant mechanisms.</dcterms:abstract>
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