What is myasthenia?And her display..

Two years ago felt,that voice changed, and tongue, every meal time eating is bad for me, as at hospital talked about a bad results and cure.
Myasthenia is a pathology muscles weakness, and theirs fast fatigue, were involving any muscles, as a most often is face, as a display after work physic and talk, and fatigue lost you changing and on the face, as eyelids low, saliva display often, strabismus, wrinkles deep on forehead, and horizontal closed smile as calling Pjero s smile, tongue and throat damaged, as voice lost, swallowing bad, head poor keeping a straight, poor sit,walk, if extremities involving, he cannot help itself, as to evening feeling depression, and on a morning after sleep you feeling better.