It manifests itself with varying degrees of weakness of the muscles under voluntary control. Symptoms usually include drooping eyelids, double vision, slurred speech, difficulty chewing, swallowing, talking, walking and or breathing. The disease and its symptoms are a result of a defect in the transmission of the nerve impulse to the muscle at the nerve muscle junction. MG can strike anyone of any age.
Weakness can vary from day to day and even hour to hour.
Most patients are at their best upon waking in the morning or even after a nap. As a day progresses the patient may become weaker and generally more fatigued. Usually after a period of rest symptoms will improve. Different muscle groups may be involved in different people. Ocular involving the eye muscles and eyelids, and generalized involving larger groups of muscles.