Many studies have been done on effect of age on H-reflex and motor nerve conduction velocity but all have controversial results. In this study effect of age on H-reflex and MNCV of Tibial and CPN was studied on 50 healthy normal subjects which were divided five age groups which are 10-20, 20-30, 30-40, 40-50, 50-60, with 5 males and 5 females in each group. The F-value for any of the variable was not significant against table value 2.57 and the correlation values show that in Gp1 there is significant correlation between tibial and CPN LD, in Gp2 H-latency and tibial LD, in Gp3 between H-latency and tibial LD, CPN MNCV and tibial NCV, H-latency and CPN LD, CPN MNCV and tibial MNCV, in Gp4 between H-latency and CPN LD and in Gp5 significant correlation not between any of the values. It was concluded that there is no significant effect of age on H-reflex and MNCV of tibial nerve and CPN and there is no significant difference in the values of H-reflex and CPN MNCV between both the sexes except tibial MNCV. The age correction formula for H-latency could not be created because of little variations in the mean values.

Key words Age, H-reflex, tibial motor nerve conduction velocity (MNCV), common peroneal nerve (CPN) MNCV, latency difference (LD) sex.