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.
How Much Sleep? While a cow might spend half the day lying down, she sleeps only a fraction of that time, simply relaxing the rest of the time. Our bovine friends spend around 3.9 hours each day sleeping, which is only 16.4 percent of a 24-hour period. This is half the amount an adult human sleeps each day. Cows usually don't sleep 3.9 hours straight, instead sleeping for shorter periods of time.