Stage 2. Next, eye movement stops and brain waves become slower, with alpha activity shutting down entirely. The brain will begin to produce â sleep spindles â â brief bursts of activity that last for about half a second before dying down. The average adult will spend most of her night in this stage.
Swollen feet and legs, referred to medically as edema, occur when fluid is retained in the spaces between body cells. Edema typically affects the feet, ankles and lower legs, but can also impact any area of the body, causing systemic symptoms. Causes:
There are many potential causes of foot, leg, and ankle swelling. They include certain lifestyle conditions or medications, such as: 1  being overweight. 2  standing for prolonged periods of time. 3  being confined for long periods of time (especially during car rides or flights).