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.
Philadelphia is the center of economic activity in Pennsylvania and is home to seven Fortune 1000 companies. The Philadelphia skyline is growing, with several nationally prominent skyscrapers. The city is known for its arts, culture, and history, attracting over 39 million domestic tourists in 2013.