Copper rates, and carcass dressing percentages. Chronic copper toxicity does not normally occur in humans because of transport systems that regulate absorption and excretion. Autosomal recessive mutations in copper transport proteins can disable these systems, leading to Wilson's disease with copper accumulation and cirrhosis of the liver in persons who have inherited two defective genes. Elevated copper levels have also been linked to worsening symptoms of Alzheimer's disease. In the US, the Occupational Safety and Health Administration (OSHA) has designated a permissible exposure limit (PEL) for copper dust and fumes in the workplace as a time-weighted average (TWA) of 1 mg/m.
Alcohol-related brain damage these damaging effects. A nutritional deficiency in thiamine can worsen alcohol-related brain damage. There is a genetic component to thiamine deficiency that causes intestinal malabsorption. More frequently however, thiamine deficiency is caused by excessive alcohol consumption. This leads to Wernicke’s encephalopathy and Korsakoff’s Syndrome which frequently occur simultaneously, known as Wernicke-Korsakoff syndrome. Lesions, or brain abnormalities, are typically located in the diencephalon which result in anterograde and retrograde amnesia, or memory loss. Neuroimaging is used to study the effect that alcohol has on the brain. The two main imaging methods are hemo-dynamic and electromagnetic. These techniques have allowed for the