Myasthenia gravis is characterized by weakness and rapid fatigue of any of the muscles under your voluntary control. It’s caused by a breakdown in the normal communication between nerves and muscles. Though this disease can affect people of any age, it’s more common in women younger than 40 and in men older than 60.MG affects...

Myasthenia gravis is characterized by weakness and rapid fatigue of any of the muscles under your voluntary control. It’s caused by a breakdown in the normal communication between nerves and muscles. Though this disease can affect people of any age, it’s more common in women younger than 40 and in men older than 60.MG affects...