Motor Neuron Disease Maladie de Charcot Lou Gehrig's Disease What is the Disease? ALS is an extremely deadly disease affecting the nerve cells that control the victim's voluntary muscles. These nerves shrink and eventually die, leaving the muscles without stimulation. As these muscles go without stimulation, they too eventually shrink and die. The victim progressively weakens to the point of complete paralysis of all voluntary muscles and some involuntary muscles, such as breathing and swallowing, and soon after this point, death is i ....