Rivastigmine (sold under the trade name Exelon) is a parasympathomimetic or cholinergic agent for the treatment of mild to moderate dementia of the Alzheimer's type and dementia due to Parkinson's disease.
Quick Answer. According to the University of Washington, cows sleep for approximately 3.9 hours per day, meaning that they spend about 16.9 percent of the day sleeping. Adult humans sleep for approximately 8 hours per day, which represents 33.3 percent of the day. Human infants sleep approximately 16 hours per day.
According to a 2013 Gallup poll, 40 percent of American adults get six hours or less per night. Even children are becoming sleep deprived. According to the 2014 Sleep in America Poll, 58 percent of teens average only seven hours of sleep or less.