Central Nervous System

Question 1

What do oligodendrocytes do?

Answer 1

• The same thing as Schwann cells but only in the CNS

- The relationship of cytoplasm and myelin is essentially the same as that of Schwann cells

Question 2

What is the structure of oligodendrocytes?

Answer 2

• Large nuclei
• Very small
• Oligodendrocytes line up next to the length of several axons
• Cytoplasmic processes from the oligodendrocyte cell body for flattened cytoplasmic sheaths that wrap around each of the axons
• Wrap around more than one axon simultaneously

Question 3

What support cells exist in the CNS?

Answer 3

• Oligodendrocytes
• Astrocytes
  
  • Transport mechanism that controls the flow of nutrients in the CNS
  • Regulate their own zone
  • Impact on numerous nerve cells
  • Feet contribut to blood-brain barrier
• Microglial cells
• Ependymal cells

Question 4

What is multiple schlerosis?

Answer 4

• Remitting and relapsing disease
• Degenerative
• Caused by autoimmune degradation of myelin (probably EBV)
• Only occurs in peripheral nerves

Question 5

What are the symptoms of multiple sclerosis?

Answer 5

• Fatigue
• Vision problems (diplopia
• Slurred speech (dysarthria)
• Numbness and tingling sensations (paraesthesia)
• Mobility issues (muscle spasms)
• Urinary retention
• Constipation

Symptoms caused by loss of conduction velocity