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 further evidence of this phenomenon, there has been research done with right hemisphere damaged patients using Norman Rockwell pieces. In these experiments, participants are shown a painting, without the title attached, and are asked to describe what is happening in the scene. As can be expected, there are variances between the answers of people with right hemisphere damage and no brain damage. These experiments have provided further evidence for the idea that individuals with right hemisphere damage have a hard time recognizing emotions of others as they do not mention them when asked to describe the paintings. In addition, this