Final answer:
Neurodegenerative disorders are illnesses characterized by a loss of nervous system functioning that are usually caused by neuronal death. These diseases generally worsen over time as more and more neurons die. The progressive degeneration of the brain is characterized by neurodegenerative diseases.
Step-by-step explanation:
Neurodegenerative disorders are illnesses characterized by a loss of nervous system functioning that are usually caused by neuronal death. These diseases generally worsen over time as more and more neurons die. The symptoms of a particular neurodegenerative disease are related to where in the nervous system the death of neurons occurs.
These disorders include Alzheimer's disease, Parkinson's disease, Huntington's disease, amyotrophic lateral sclerosis (ALS), Creutzfeld-Jacob disease, multiple sclerosis (MS), and other types of dementia disorders. The progressive degeneration of the brain is characterized by neurodegenerative diseases.