Electroneuromiografical alteration in the state of peripheral nerves at patients with chronic mercury intoxication and at persons exposed to mercury

With the use of electroneuromyography method the state of peripheral nerves in lower and upper extremities has been studied at patients of the following groups: patients with long-term working exposed to mercury compounds (N=47); patients with the first determined diagnosis of chronic mercury intoxication (CMI) (N=12); 45 patients – workers with diagnosis of CMI (post-exposure period 8,5±2,6 years). The disorders revealed of motor nervous component in the 1 group were displayed as subthreshold rate reductions of impulse transport in the lower extremities and as a local demyelinized injury of the upper extremities. Then the aggravation of disorders revealed was observed. In studying the sensoric component in the persons of the 1 group the changes were found to display either the axonal or the demyelinized injuries and in studying patients of the 2 nd and 3 rd group the injuries were registered as the axonal-demyelinized type. The involvement of sensoric axons of the peripheral nerves into the pathological process was mainly observed to the occurrence at workers with long-term working period and prevalence of motor disorders was revealed after some time period.