With ALS, motor neurons in your brain and spinal cord break down and die. When this happens, your brain can't send messages to your muscles anymore.
At first, your muscles get weak or stiff. You may have more trouble with fine movements -- such as trying to button a shirt or turn a key. You may stumble or fall more than usual. After a while, you can't move your arms, legs, head, or body.
Keyword: beginning symptoms als