EDAIC Multiple Choice Question and answer. FREE UPLOADS BY WWW.TARGETEDAIC.COM (71)

The section, EDAIC Multiple Choice Question and answer, covers a different topic each day with the intent that candidates can prepare one small topic each day, making steady progress in their exam preparation.

Question: Identify the true statements regarding peripheral nerve injury:
(a) Wallerian degeneration occurs proximally to injury.
(b) Retrograde degeneration occurs proximally to the site of injury.
(c) Swelling of cytoplasm indicates severe injury.
(d) Nissl substance is an indicator of recovery.
(e) Axonal regeneration takes about 1 week to start.

Answers:

1. 1. false
   2. true
   3. true
   4. true
   5. false

Explanation:

• Wallerian degeneration: components distal to the site of injury degenerate and are destroyed by phagocytosis. It takes about 4 weeks to finish.
• Primary or retrograde degeneration occurs primarily and proceeds for at least
  one intermodal space.
• Severe injury may be evident by chromatolysis (swelling of cytoplasm with an eccentric displacement of cell’s nucleus).
• Nissl substance is rough endoplasmic reticulum and a site of protein synthesis.
• Axonal regeneration starts within 24 h.

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‘EDAIC Multiple Choice Question and answer’ covers a different topic each day with the intent that candidates can prepare one small topic each day, making steady progress in their exam preparation.