Amyotrophic lateral sclerosis

Amyotrophic lateral sclerosis is a neurological condition that affects the nervous system of adults, causing lesions on nerve cells (neurons) that eventually result in progressive paralysis. The disease is characterized by damage to motor neurons (neurons that transmit messages that cause movements). These neurons are located in the spinal marrow, and more precisely in their anterior sheath. They are also located in the motor nodes (islands of gray matter located within the white matter) of certain cranial nerves.