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.
Right hemisphere brain damage Right hemisphere brain damage Right hemisphere brain damage (RHD) is the result of injury to the right brain hemisphere. The right hemisphere of the brain coordinates tasks for functional communication, which include problem solving, memory, and reasoning. Deficits caused by right hemisphere brain damage vary depending on the location of the damage. Individuals with right hemisphere damage exhibit deficits in visual processing. It appears as though they are only able to recognize the parts of a picture, symbol, etc. rather than seeing the image as a whole. This was shown during an experiment when patients with right hemisphere damage had