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.
For the first week, they sleep a total of 16-18 hours, about half during the night and half spread out over four daytime naps. From 2 weeks to 2 months of age, they sleep an average of 15.5-17 hours total, about 8.5-10 hours at night and six to seven hours during the day spread out over three to four naps.