Pulling consecutive all-nighters makes some brain areas groggier than others. Regions involved with problem solving and concentration become sluggish when sleep-deprived, a new study using brain scans reveals. Other areas keep ticking along, appearing to be less affected by a mounting sleep debt

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Pulling consecutive all-nighters makes some brain areas groggier than others. Regions involved with problem solving and concentration become sluggish when sleep-deprived, a new study using brain scans reveals. Other areas keep ticking along, appearing to be less affected by a mounting sleep debt