Table 1.

Typical nerve conduction findings seen with axonal and demyelinating lesions

	Axonal	Demyelinating
Sensory loss	Small or absent	Small or absent
Distal motor latency	Normal or slightly prolonged	Prolonged
CMAP (compound motor action potential) amplitude	Small	Normal
Conduction block/temporal dispersion	Not present	Present
Motor conduction velocity	Normal or slightly reduced	Notably reduced
F waves latency	Normal or slightly prolonged	Significantly prolonged