Which nerve injury is defined as mildest, with no disruption of axons?

• A. Axonotmesis
• B. Neurotmesis
• C. Neuropraxia
• D. Palsy

Answer: (C)

The key idea is recognizing the mildest form of peripheral nerve injury in the common classification that describes how nerves respond to trauma. Neuropraxia is the mildest type, and it occurs when the nerve’s axon remains intact but there is a temporary block in conduction due to focal demyelination or compression. Because the axon itself isn’t damaged, there’s no Wallerian degeneration, and function often returns quickly once the myelin is repaired and the edema or pressure resolves.

This is why it’s the best answer here: the scenario describes a temporary loss of function with no axonal disruption. The other types involve actual damage to the axon or the entire nerve structure, leading to longer recovery times and, in some cases, incomplete recovery. Axonotmesis involves axonal disruption with preserved connective tissue; regeneration occurs along the intact pathways but takes time. Neurotmesis is a complete nerve disruption, often requiring surgical repair. Palsy is a clinical manifestation (paralysis) rather than a specific injury pattern.

So, neuropraxia fits the description of the mildest injury with no disruption of axons and typically a rapid, complete recovery.