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Document ID (ISN)100687
CIS number 02-1787
ISSN - Serial title 1232-1087 - International Journal of Occupational Medicine and Environmental Health
Year 2001
Convention or series no.
Author(s) Sińczuk-Walczak, Jakubowski M., Matczak W.
Title Neurological and neurophysiological examinations of workers occupationally exposed to manganese
Bibliographic information 2001, Vol.14, No.4, p.329-337. 16 ref.
Abstract To assess the effects of manganese on the functions of the nervous system in exposed workers in the shipbuilding and electrical industries, 75 male workers, 62 welders and fitters and 13 workers involved in battery production, were studied. The control group consisted of 62 non-exposed men matched by age and work shift distribution. Of the 62 welding workers, 30 worked in the area with Mn concentrations exceeding the MAC value of 0.3mg/m3. In battery production, six subjects were subject to concentrations exceeding MAC values. Clinically, the increased emotional irritability, dysmnesia, concentration difficulties, sleepiness and limb paresthesia predominated among the disorders of the nervous system functions in exposed workers. Generalized and paroxysmal changes were the most common recordings in the abnormal electroencephalography. Visual evoked potentials examinations showed abnormalities which could be a signal of the optic neuron disorders. The results show that manganese exposures within the range of <0.01-2.67mg/m3 can induce sub-clinical effects on the nervous system.
Descriptors (primary) neurotoxic effects; manganese and compounds; welding and cutting; shipyards; battery and dry cell manufacture; manganese
Descriptors (secondary) threshold limit values; case-control study; chronic toxicity; long-term exposure; electroencephalography
Document type D - Periodical articles
Country / State or ProvincePoland
Subject(s) Toxic and dangerous substances
Broad subject area(s) Chemical safety
Browse category(ies) Diseases of the nervous system
Inorganic substances
Shipbuliding and ship repair
Welding and cutting
Manufacturing of electrical appliances and equipment