> Motor neurone disease is a group of diseases that affect the nerve cells in the brain and spinal cord that tell your muscles what to do. > > Also known as ALS

> Motor neurone disease is a group of diseases that affect the nerve cells in the brain and spinal cord that tell your muscles what to do. > > Also known as ALS, it causes muscle weakness and stiffness. ALS is not an alias for MNDs in general. Instead, it's an example for an MND.