in his amnesia. Henry Molaison, formerly known as patient H.M. Molaison had epileptic seizures and had his medial temporal lobes surgically removed to prevent or decrease the occurrence of the seizures. After the removal of Molaison's medial temporal lobes, he had anterograde amnesia as well as moderate retrograde amnesia. Molaison was still able to retain procedural memory after the surgery. KC (patient) "The extent of damage to K.C.'s medial temporal lobes, particularly to his hippocampus and parahippocampal gyrus, and associated diencephalic and basal forebrain structures, is in line with his profound impairment on all explicit tests of new learning and memory. There is some uncertainty as to whether this pattern of neurological damage also accounts for his severe remote autobiographical memory loss while sparing his remote spatial memory." Zasetsky Zasetsky was a patient who was treated by Russian neuropsychologist Alexander Luria Aging Normal aging, although not responsible for causing memory disorders, is associated with a decline in cognitive and neural systems including memory (long-term and working memory). Many factors such as genetics and neural degeneration have a part in causing memory disorders. In order to diagnose Alzheimer's disease and dementia early, researchers are trying to find biological markers that can predict these diseases in younger adults. One such marker is a beta-amyloid deposit which is a protein that deposits on the brain as we age. Although 20-33% of healthy elderly adults have these deposits, they are increased in elderly with diagnosed Alzheimer's disease and dementia. Additionally, traumatic brain injury, TBI, is increasingly being linked as a factor in early-onset Alzheimer's disease. The National Health and Nutrition Examination Survey (NHANES) administered the word learning and recall modules from the Consortium to Establish a Registry for Alzheimer's disease (CERAD) to over three thousand participants 60 years and older in 2011–2014. Trained interviewers administered the test at the end of a face-to-face private interview in an examination center. An extensive analysis of these data has been published. Delayed recall scores (median, 25th percentile, 75th percentile) declined with age: 60-69y: 6.4, 4.9, 7.8; 70-79y: 5.5, 3.9, 7.0; 80+y: 4.1, 2.4, 5.8. One study examined dementia severity in elderly schizophrenic patients diagnosed with Alzheimer's disease and dementia versus elderly schizophrenic patients without any neurodegenerative disorders. In most cases, if schizophrenia is diagnosed, Alzheimer's disease or some form of dementia in varying levels of severity is also diagnosed. It was found that increased hippocampal neurofibrillary tangles