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.
Delta-sleep-inducing peptide (DSIP): a review. Graf MV, Kastin AJ. Since the turn of the century, it has been postulated that humoral factors induce sleep. Many compounds were proposed as sleep-factors, but only two of the sleep-peptides have been purified to homogeneity and characterized, so far.n addition to sleep, the peptide also has been observed to affect electrophysiological activity, neurotransmitter levels in the brain, circadian and locomotor patterns, hormonal levels, psychological performance, and the activity of neuropharmacological drugs including their withdrawal.