Diagnostic utility of distal nerve conduction studies and sural near-nerve needle recording in polyneuropathy

Nerve conduction studies (NCS) are a very useful tool in diagnosing polyneuropathy (PNP) both with respect to confirming the PNP and classifying it as primarily demyelinating or axonal (Donofrio and Albers, 1990; Tankisi et al., 2005). Since most PNPs follow a length dependent pattern, the sensory nerves of the feet are usually affected in the early stages (Oh et al., 2001; Park et al., 2003; Singleton et al., 2008; Singleton, 2005). The sural nerve is the most frequently examined nerve in the electrodiagnosis of PNP (Burke et al., 1974).

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