Sleep spindles, an EEG manifestation generated by the thalamo-cortical loop and implicated in sleep-dependent learning were recently associated to voxel-based metrics of brain white matter. Thus, we aimed to investigate if specific bundles of streamlines underlying the thalamo-cortical loop will be associated to sleep spindles variables in twenty-five young subjects. Our study showed that the median fiber length of streamlines connecting the thalamus to the anterior and middle part of the superior frontal gyrus significantly predicted sleep spindles amplitude and frequency measured on frontal and central electrodes.
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