Conduction velocity in slower motor fibres.

Measuring conduction velocity in slower fibres (CVSF), through a partial antidromic block (Hopf-Seppäläinen method), allows estimating the dispersal of conduction velocity in motor fibres by the difference between the maximal motor conduction velocity (MCV) and CVSF. Investigations performed in workers exposed to medium concentrations of carbon disulphide show difference between MCV and CVSF as providing a more sensitive indicator for early diagnosis of peripheral neuropathies than MCV.