to examine the antagonistic effects of lead , zinc and copper on the nervous system in man , we measured maximal motor and sensory conduction velocities ( mcv and scv , respectively ) in the distal radial and median nerves in 20 gun metal founders with asymptomatically increased absorption of these metals [ blood lead concentrations ranged from 16 to 64 micrograms/dl ( mean 42 ) ] ;
C0027763
nervous
C0025058
median nerves