Plus an interesting Article on.. ((( Smiles )))

Effects of occupational exposure to mercury or chlorinated hydrocarbons on the auditory pathway.
In Noise & Health

The purpose of this study was to examine the effects of industrial exposure to mercury and chlorinated hydrocarbons (CH) on the auditory pathway.
And about..
the usefulness of ABR in detecting subclinical CNS effects of mercury and chlorinated hydrocarbons (CH)..
And it was talking about..

The statistically significant relationship between exposure to mercury and CH and the ABR I-III IPL prolongation may suggest a neurological effect at the level of the 8th nerve and the cochlear nuclear complex.
And it mentioned that..
Thus, it seems that even those levels of neurotoxic agents considered being safe and inert to worker's health might cause subclinical neurologic dysfunction in long-term exposures.

It's an interesting article to read in full..
Here it is..

http://www.noiseandhealth.org/article.asp?issn=1463-1741;year=2002;volume=4;issue=16;spage=71;epage=77;aulast=Shlomo