ALS (Lou Gehrig's Disease)
In many areas of the world, ALS is known as motor neuron diseases (MND). Motor neuron diseases are characterized by progressive muscle weakness and atrophy (wasting away or loss of muscle). There are several types of motor neuron diseases. If only the upper motor neurons (originating in the brain) are damaged, it is called primary lateral sclerosis. When only the lower motor neurons (originating in the spinal column) are damaged, it is referred to as spinal muscular atrophy or progressive muscular atrophy.
For more information about ALS, be sure to visit the ALS Association website.