This video is a brief outlook on autoimmune disorders of muscles known as myasthenia gravis. The neurotransmitter involved signs, symptoms, diagnosis and treatment. MG is a chronic autoimmune disorder in which antibodies destroy the communication between nerves and muscle, resulting in the weakness of the skeletal muscles. TIMELINE: 0:04 Introduction 0:14 Causes 0:30 Acetylcholine 0:50 Signs and symptoms 1:03 Diagnosis 1:40 Treatment 2:12 Thymus involvement 2:48 Conclusion 3:36 End