The finding in nerve conduction study to suggest axonal neuropathy among the following is:: (A) Slow conduction velocities, (B) Prolonged distal latency, (C) Relatively preserved amplitude, (D) Late potentials
Answer is D. To classify neuropathy into axonal degeneration or segmental demyelination the most helpful test is: NCS-Nerve conduction study. MUST KNOW: Findings to suggest axonal neuropathy in NCS: Relatively preserved distal latencies, conduction velocities, and late potentials. Fibrillations on needle EMG Findings to suggest demyelination in NCS: Slow conduction velocities, Prolonged distal latencies Late potentials Relatively preserved amplitudes Absence of fibrillations on needle EMG Ref: Harrison, Edition-18, Page- 3448