Describe Amyotrophic Lateral Sclerosis (ALS)

Describe amyotrophic lateral sclerosis (ALS) .

A) ALS is a progressive disorder characterized by loss of higher-order cerebral functions and is the most common cause of senile dementia.
B) ALS is a progressive degeneration of the motor neurons of the CNS,leading to muscle atrophy and eventual paralysis.
C) ALS is a disease of the CNS characterized by recurrent incidents of demyelination that affects axons in the optic nerve,brain,and spinal cord.
D) ALS results when the neurons of the substantia nigra are damaged or secrete less dopamine and the basal nuclei become more active causing muscle rigidity and stiffness.
E) ALS is a nonprogressive loss of motor function that appears during infancy or childhood and persists throughout the person's lifetime.