A group of 37 workers exposed to styrene used in the plastic mass manufacture was investigated. No damage of the hepatic parenchyma, hematopoiesis or other internal affection was proved; irritative styrene effects were, however, observed, skin was attacked and higher genetic risk was evidenced. From the viewpoint of neurotoxicology, pseudoneurasthenic syndromes, predominantly inhibitory, could be seen, which was proved also by electroencephalography; higher incidence of lesion findings was also found in the risk group. Slight neuropathies of distal type, sensitive-motor, not dependent on the length of exposure were found by electromyography. Abnormalities in electrophysiological examinations appear earlier. The results obtained are significant for further preventive follow-up of persons under exposure.

Somatosensory evoked potentials in workers exposed to toluene and styrene