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- W2012138373 abstract "Contribution of the subcortical nuclei to the coordination of human behavior is dependent on the existence of appropriate anatomical architecture. Interpretations of available data have led to opposing ‘information funneling’ and ‘parallel processing’ hypotheses. Using motor circuit as a model, we examined whether cortico-subcortical circuits, especially cortico-basal ganglia circuits, are funneled or parallel in the control of volitional movement. Twenty-five healthy subjects underwent functional magnetic resonance imaging (fMRI). Activated clusters during self-initiated, sequential finger-to-thumb opposition movements of the left hand were identified in the bilateral supplementary motor area (SMA), right lateral premotor cortex (PM) and primary motor cortex (M1), and in the right striatum and thalamus. These functionally defined clusters were applied to probabilistic tractography based on diffusion-weighted MRI to examine patterns of connectivity. Striatal and thalamic sub-regions with high probabilities of connection to the motor cortices partially overlapped, with connection to the two premotor areas outspreading rostrally relative to M1. We suggest that, on a macroscopic anatomical level, there is overlap as well as segregation among connections of the motor cortices with the striatum and thalamus. This supports the notion that neuronal information of the motor cortices is funneled, and parallel processing is not an exclusive principle in the basal ganglia." @default.
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- W2012138373 date "2013-09-01" @default.
- W2012138373 modified "2023-10-14" @default.
- W2012138373 title "Overlapping connections within the motor cortico-basal ganglia circuit: fMRI-tractography analysis" @default.
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- W2012138373 doi "https://doi.org/10.1016/j.neuroimage.2013.04.026" @default.
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