Nerve conduction studies (NCS)
Written and reviewed by Dr Ibrahim Imam, Consultant Neurologist. Last reviewed .
Nerve conduction studies (NCS). F waves: these assess conduction across the whole motor nerve. Fully referenced neurology checklist.
Test indices
- F waves: these assess conduction across the whole motor nerve
- F reflex: this assesses both motor and sensory functions
- Conduction block (CB): this is assessed with compound muscle action potential (CMAP)
- Temporal dispersion: this is CB with increased duration
- Distal motor latency (DML): this is significantly prolonged with anti-MAG neuropathies
Features of axonal neuropathy
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Features of demyelinating neuropathy
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Sural sparing: causes
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