2265. Explanation
Correct Answer: A) Physiological conduction block
Explanation:
Neuropraxia is characterised by a physiological conduction block without structural disruption of the axon or surrounding connective tissue.
It is the mildest form of peripheral nerve injury
Commonly caused by compression or mild traction injury
There is a temporary interruption of nerve conduction without structural damage
Features:
Physiological conduction block occurs.
The axon remains intact.
0 No Wallerian degeneration occurs
Clinical manifestations:
Temporary motor weakness and sensory loss may occur.
Recovery is usually complete within days to weeks
Examples:
Saturday night palsy
ใ Transient nerve compression injuries.
Axonal disruption (Option B) occurs in axonotmesis and neurotmesis, associated with Wallerian degeneration distal to injury
Nerve trunk damage (Option C): Severe injury involving the entire nerve trunk is seen in neurotmesis, and recovery is poor without surgical repair
Perineurium damage (Option D): Damage to the perineurium suggests more severe nerve injury than neuropraxia and is associated with axonotmesis or neurotmesis
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1September 7, 2026 1.5K
