What is Multifocal Motor Neuropathy (MMN)?

Multifocal motor neuropathy (MMN) is a disease that affects your body's motor nerves. Those are the nerves that control your muscles. The condition makes it hard for them to send the electrical signals that move your body, which makes your hands and arms feel weak. MMN in Canada is not life-threatening, and, in most cases, treatments can make the muscles stronger.

What causes Multifocal Motor Neuropathy?

No one knows what causes Multifocal Motor Neuropathy (MMN) in Canada. Scientists do know it’s an autoimmune disease, meaning your immune system mistakenly attacks your nerve cells as if they were invaders. Researchers are studying the disease to try to find out why it happens.

What are the symptoms of Multifocal Motor Neuropathy?

If you have MMN, you’ll most likely notice the first symptoms:

1. In your hands and lower arms.

2. Your muscles may feel weak and cramp up or twitch in a way you can’t control. It may start in specific parts of the arm or hand, like the wrist or finger.

3. Usually the symptoms are more severe on one side of your body. The disease may eventually affect your legs.

4. MMN isn’t painful, and you’ll still be able to feel with your hands and arms because your sensory nerves are not affected.

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