Quiz on Multiple Sclerosis

What are the two stages of lesion development in MS as shown by MRI?

• Development of large lesions and healing

• Development of small inflammatory lesions and extension with demyelination

• Immediate scar formation and healing

• Inflammation and complete recovery

What is unknown about the inflammatory process in MS?

• Whether it affects the heart or lungs

• Whether it is directed against myelin or oligodendrocytes

• Whether it causes immediate recovery

• Whether it affects the skin or bones

Under what condition can remyelination occur in the CNS?

• If the demyelination process is halted before oligodendrocytes die

• If the patient is over 50 years old

• If the inflammation is severe

• If the patient has no symptoms

What happens to a normal axon during MS progression?

• It becomes stronger

• Myelin breaks down, leading to non-functioning axon

• It regenerates quickly

• It remains unaffected

What is the result of myelin breakdown in MS?

• Enhanced nerve function

• Total disruption and axon not functioning

• Immediate healing

• Increased myelin production

What is the role of oligodendrocytes in the CNS?

• They cause inflammation

• They produce myelin

• They destroy neurons

• They are unrelated to MS

What is the significance of nodes of Ranvier in axons?

• They are unrelated to nerve function

• They are involved in myelin breakdown

• They help in nerve signal transmission

• They cause axon damage

What is the primary function of myelin in the nervous system?

• To cause inflammation

• To insulate nerve fibers and speed up signal transmission

• To destroy neurons

• To slow down nerve signals

What does CNS stand for?

• Central Nervous System

• Central Neuron System

• Cerebral Nervous System

• Cerebral Neuron System

What is the main pathological feature of MS?

• Increased neuron production

• Demyelination and scar formation

• Enhanced nerve function

• Decreased inflammation