INTRO - CNS & PNS

Question 1

Damage to CNS

Answer 1

• Next proximal stump regenerate

- Growth stopped by astrocyte proliferation

Question 2

Rhizotomy

Answer 2

• Posterior, anterior roots only sites motor and sensory fibers are segregated
• Surgeon will selectively section either element to alleviate intractable pain or spastic paralysis

Question 3

Neuron proliferation in adult NS

Answer 3

With the exception of olfactory neurons, adults nerves do not proliferate

Question 4

Paresthesia

Answer 4

pins and needles sensation

Question 5

Vasa nervorum

Answer 5

blood vessels supplying nerves

Question 6

Anterograde (Wallerian) degeneration

Answer 6

Degeneration of axons detached from their cell bodies (in the distal direction), degeneration involves axon and myelin sheath.