Usually when I read about simple partial seizures, I read about them affecting the extremities (legs and arms). Is it possible for them to strike one's side/abdomen as well? There is a specific muscle in my upper right side that keeps jerking. The problem is becoming more frequent and bothersome. When it happens, it feels like I've been struck by a big jolt of electricity. I also have muscle spasms in other parts of my body. How can you tell the difference between seizure activity and your everyday muscle spasm that anyone might have?