TG and Alzheimer disease: These subjects often show higher glucocorticoids plasma levels, when compared to healthy controls, in parallel with a reduced responsiveness to these hormones (Csernansky et al. 2006); moreover, corticotropin releasing-hormones (CRH) levels are altered in the cerebrospinal fluid of AD patients (Banki et al. 1992) and similar findings have been obtained concerning thyroid hormones.