Nervous system conditions that can cause muscle twitching include: 1  Amyotrophic lateral sclerosis (ALS-Lou Gehrig's disease). 2  Neuropathy or damage to the nerve that leads to a muscle. 3  Spinal muscular atrophy. 4  Weak muscles (myopathy).
Confidence votes 1.6K. Philadelphia is a city located in the state of Pennsylvania. On the north eastern side of the United States of America.In Pennslyvania.oston is in Massachusetts, Philadelphia is in Pennsylvania, and New York City is in New York State.
Expensive / Cheapest Homes by City in PA. Most / Least Educated Cities in PA. As of 2010-2014, the total population of Philadelphia is 1,546,920, which is 1.94% more than it was in 2000. The population growth rate is lower than the state average rate of 3.89% and is much lower than the national average rate of 11.61%.