What is a neurapraxia?

What is a neurapraxia?

• A. Demyelination of the axon sheath that leads to a conduction block. Usually heals in approx. 1-2 weeks
• B. Axonal transection with permanent deficits
• C. Peripheral neuropathy with degeneration
• D. Central nervous system demyelination

Answer: (A)

Neurapraxia is the mildest form of peripheral nerve injury, where the myelin sheath around the nerve fiber becomes temporarily disrupted at a focal site, causing a conduction block. The axon itself remains intact, so there is no Wallerian degeneration. Because the structural nerve fibers are preserved, recovery happens quickly as the myelin is restored and normal conduction returns. This typically occurs within about 1–2 weeks, though the exact timeline can vary with the location and extent of compression or injury. In essence, it’s a transient demyelination with preserved axonal continuity, unlike injuries where the axon is damaged or the CNS is involved.

Neurapraxia is the mildest form of peripheral nerve injury, where the myelin sheath around the nerve fiber becomes temporarily disrupted at a focal site, causing a conduction block. The axon itself remains intact, so there is no Wallerian degeneration. Because the structural nerve fibers are preserved, recovery happens quickly as the myelin is restored and normal conduction returns. This typically occurs within about 1–2 weeks, though the exact timeline can vary with the location and extent of compression or injury. In essence, it’s a transient demyelination with preserved axonal continuity, unlike injuries where the axon is damaged or the CNS is involved.