Myasthenia Gravis is a rare autoimmune disease (meaning the body attacks itself). In MG this affects muscles and nerves.
What happens in MG?
Remember that the brain sends signals to muscles for them to move?
These signals release acetylcholine which attaches to receptors.
In MG, these signals are blocked by antibodies directed against the body.
Antibodies are proteins that play an important role in the immune system.
Usually, antibodies are directed against foreign proteins (antigens) like viruses.
In MG, antibodies block the receptor sites affecting muscle movement.
This causes fatigue and muscle weakness, which affects normal activities.
You can read more information here
Disclaimer
Content has been taken from MGFA, adapted and clinically reviewed for accuracy.