* The brain scan or MRI can show cortical atrophy (particularly hippocampal), however (cortical atrophy or sub-cortical) is in other diseases of the elderly. Such reviews can also eliminate other causes: tumors, stroke, intra-cerebral hematoma or sub-dural, ethyl encephalopathy ... However indices are being evaluated to try to make an early diagnosis (including reducing the size of the hippocampus).
* The tomography positron emission is a recent review, allowing the analysis of some radioactive tracers injected into the body. There is a fairly sharp decrease metabolism of several parts of the brain (temporal lobe, parietal and posterior) with good sensitivity and specificity. The decrease in activity in the hippocampus would be a promising index.
* The strength in the cerebrospinal fluid of the protein t-tau protein phosphorylated tau and amyloid beta peptide of 42 amino acids allows imaging as a diagnostic aid Therefore, these assays are routinely available in some Hospitals edge.
* The dosages of vitamin B12 and vitamin B9 (folate), and a balance thyroid (TSH) are routinely made, because vitamin B12 and B9 or hypothyroidism may be causes of dementia (dementia curable).
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