Lying on the side is the
most common sleep position for animals in the wild. New studies from Stony
Brook University have found that a side-sleeping position seems to improve clearance
of wastes from the brain. Amyloid
beta, for example. When it builds up it can form plaques, a telltale characteristic
of Alzheimer’s disease. Using
dynamic contrast magnetic resonance imaging (MRI) researchers observed the
glymphatic pathway of rodents under anesthesia in three different positions: on
their sides (lateral position), backs (supine position), and bellies (prone
position). The rodents who were in the lateral position cleared amyloid beta
about 25 percent better than when in the prone or supine position. Some say sleeping
on your left side is a preferred option.
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