Which description corresponds to axonotmesis?

Which description corresponds to axonotmesis?

• A. Neurotmesis: Complete transection of the nerve.
• B. Neuropraxia: least severe type of nerve damage. Localized nerve damage but will fully recover.
• C. Neurapraxia: mild nerve damage with some recovery.
• D. Axonotmesis: Damage to nerve, but no complete transection. Good healing potential.

Answer: (D)

Axonotmesis describes nerve injury where the axon is damaged but the nerve is not completely transected, and the surrounding connective tissue scaffolds (like the endoneurium and perineurium) remain intact. This preserved framework allows regenerating axons to grow along the original path, giving a good chance of functional recovery, though it takes time because axons must regrow through tissue distances. Wallerian degeneration occurs distal to the injury, clarifying that there is axonal disruption rather than a full transection. This matches the statement: the nerve is damaged but not completely cut, and healing potential is good because the intact supporting structures guide regrowth. This differs from a complete transection (neurotmesis), which has a much poorer prognosis and often requires surgical repair, and from neuropraxia/neurapraxia, where the axon remains intact and recovery is typically rapid with conduction block rather than axonal loss.

Axonotmesis describes nerve injury where the axon is damaged but the nerve is not completely transected, and the surrounding connective tissue scaffolds (like the endoneurium and perineurium) remain intact. This preserved framework allows regenerating axons to grow along the original path, giving a good chance of functional recovery, though it takes time because axons must regrow through tissue distances. Wallerian degeneration occurs distal to the injury, clarifying that there is axonal disruption rather than a full transection.

This matches the statement: the nerve is damaged but not completely cut, and healing potential is good because the intact supporting structures guide regrowth. This differs from a complete transection (neurotmesis), which has a much poorer prognosis and often requires surgical repair, and from neuropraxia/neurapraxia, where the axon remains intact and recovery is typically rapid with conduction block rather than axonal loss.