Motor Neurone Disease (MND) is the name of a group of diseases that cause the death of the nerve cells (neurones) that control the muscles that enable us to move, speak, swallow and breathe.
With no nerves to activate them, these muscles gradually weaken and waste away. This causes progressive loss of mobility in the limbs, and difficulties with speech, swallowing and breathing. The progression varies significantly from person to person.
The most common type of MND is Amyotrophic Lateral Sclerosis, or ALS. In some countries, including North America, MND is called ALS.