It has been studied that excessive amounts of heavy metal elements are found in brains of patients who had Alzhemiers,Parkinsons,etc. Researchers don't know if this is a relationship/correlation because patients without these dieases are found to have high amounts of these same elements. Does anyone know how metals could react with neurons to destroy tissue biochemically? Or maybe this reaction between metals and brain tissue are at the quantum level, where electron orbits of particles could change leading to tissue destruction. So, is there any chemical/quantum evidence to support this reaction of metals leads to tissue loss?