Final answer:
Disorders of the nervous system can be caused by various factors such as infections, trauma, and congenital disorders. Conditions like Alzheimer's disease and ALS result in the degeneration of nervous tissue and loss of brain function. Infections like encephalitis or meningitis can also affect the nervous system and lead to brain damage.
Step-by-step explanation:
Disorders of the nervous system can be caused by various factors such as infections, trauma, and congenital disorders. Infections like encephalitis or meningitis and traumatic injuries to the central nervous system can lead to significant signs and symptoms. Nervous tissue may also degenerate, resulting in disorders like Alzheimer's disease or amyotrophic lateral sclerosis (ALS). These conditions can cause a gradual loss of higher brain functions and motor control. Overall, the nervous system is vulnerable to injury and disease, and the causes and symptoms of these disorders can vary.