The force of gravity is the weakest at the equator because of the centrifugal force caused by the Earth's rotation and because points on the equator are furthest from the center of the Earth. The force of gravity varies with latitude and increases from about 9.780 m/s2 at the Equator to about 9.832 m/s2 at the poles.
Also, pharmacological therapies such as sedative-hypnotics or antidepressants have been helpful in reducing the incidence of sleepwalking in some people. Sleepwalking is common in children and is usually outgrown over time, especially as the amount of deep sleep decreases.
Sleepwalking is most often initiated during deep sleep but may occur in the lighter sleep stages of non-REM sleep, usually within a few hours of falling asleep, and the sleepwalker may be partially aroused during the episode. In addition to walking during deep sleep, other symptoms of sleepwalking include: Sleeptalking.