La Miastenia Gravis es una enfermedad neuromuscular autoinmune crónica que se caracteriza por debilidad y fatigabilidad muscular, la cual empeora tras la actividad física y mejora con el reposo. Las manifestaciones clínicas son muy variables, únicamente afecta a musculatura estriada, no afectándose por lo tanto la musculatura cardiaca o intestinal. Los músculos más afectados suelen ser a nivel facial, ojos, y musculatura proximal (cintura escapular y pelviana).
Myasthenia Gravis is a chronic autoimmune neuromuscular disease characterized by muscle weakness and fatigue, which worsens after physical activity and improves with rest. It occurs when the immune system produces antibodies that block or destroy acetylcholine receptors located at the neuromuscular junction, thereby hindering their activation. The clinical manifestations are highly variable and only affect striated muscles, meaning that cardiac or intestinal muscles are not affected. The muscles most commonly involved are those of the face, eyes, and proximal musculature (shoulder and pelvic girdles). It is more common in women under 40 years of age and in older men, although it can occur in both sexes at any age.