These findings provide some evidence that reduced slow wave sleep (SWS) and rapid eye movement sleep (REM) may contribute to brain atrophy, thereby increasing the risk of Alzheimer disease (AD).

4). For all subjects, the stimulated area included the intraparietal sulcus and the adjacent cortex in the superior and inferior parietal lobule. Although the stimulated area varied slightly among ...

Sleep deficiency is associated with atrophy of the inferior parietal region of the brain, according to a study published online.

There was an association between having less REM with smaller volumes of the inferior parietal region and precuneus (β = −75.54 and −31.92 mm 3 per −1 percentage point of REM, respectively).