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Palminteri, Stefano; Lebreton, Mael; Worbe, Yulia; Hartmann, Andreas; Lehericy, Stephane; Vidailhet, Marie; Grabli, David; Pessiglione, Mathias – Brain, 2011
Reinforcement learning theory has been extensively used to understand the neural underpinnings of instrumental behaviour. A central assumption surrounds dopamine signalling reward prediction errors, so as to update action values and ensure better choices in the future. However, educators may share the intuitive idea that reinforcements not only…
Descriptors: Learning Theories, Models, Symptoms (Individual Disorders), Prediction
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Vann, Seralynne D. – Brain, 2009
Mammillary body atrophy is present in a number of neurological conditions and recent clinical findings highlight the importance of these nuclei for memory. While most accounts of diencephalic amnesia emphasize the functional importance of the hippocampal projections to the mammillary bodies, the present study tested the importance of the other…
Descriptors: Neurology, Short Term Memory, Neurological Impairments, Brain Hemisphere Functions
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Na, Shin-Young; Cao, Yi; Toben, Catherine; Nitschke, Lars; Stadelmann, Christine; Gold, Ralf; Schimpl, Anneliese; Hunig, Thomas – Brain, 2008
In multiple sclerosis, CD8 T-cells are thought play a key pathogenetic role, but mechanistic evidence from rodent models is limited. Here, we have tested the encephalitogenic potential of CD8 T-cells specific for the model antigen ovalbumin (OVA) sequestered in oligodendrocytes as a cytosolic molecule. We show that in these "ODC-OVA" mice, the…
Descriptors: Animals, Disabilities, Anatomy, Diseases
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Thornhill, Paul; Bassett, David; Lochmuller, Hanns; Bushby, Kate; Straub, Volker – Brain, 2008
A number of muscular dystrophies are associated with the defective glycosylation of [alpha]-dystroglycan and many are now known to result from mutations in a number of genes encoding putative or known glycosyltransferases. These diseases include severe forms of congenital muscular dystrophy (CMD) such as Fukuyama type congenital muscular dystrophy…
Descriptors: Symptoms (Individual Disorders), Brain, Disabilities, Neurological Impairments
Nowak, Dennis A.; Glasauer, Stefan; Hermsdorfer, Joachim – Brain, 2004
Grip force control relies on accurate internal models of the dynamics of our motor system and the external objects we manipulate. Internal models are not fixed entities, but rather are trained and updated by sensory experience. Sensory feedback signals relevant object properties and mechanical events, e.g. at the skin-object interface, to modify…
Descriptors: Feedback, Models, Sensory Experience, Psychomotor Skills