myasthenia gravis

US /ˌmaɪ.əsˈθiː.ni.ə ˈɡræv.ɪs/
UK /ˌmaɪ.əsˈθiː.ni.ə ˈɡræv.ɪs/
"myasthenia gravis" picture
1.

a chronic autoimmune neuromuscular disease characterized by varying degrees of weakness of the skeletal (voluntary) muscles of the body

:
She was diagnosed with myasthenia gravis after experiencing severe muscle weakness.
Treatment for myasthenia gravis often involves medications that improve neuromuscular transmission.