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Neurofibrillary Tangles: Abnormal structures located in various parts of the brain and composed of dense arrays of paired helical filaments (neurofilaments and microtubules). These double helical stacks of transverse subunits are twisted into left-handed ribbon-like filaments that likely incorporate the following proteins: (1) the intermediate filaments: medium- and high-molecular-weight neurofilaments; (2) the microtubule-associated proteins map-2 and tau; (3) actin; and (4) Ubiquitins. As one of the hallmarks of Alzheimer disease, the neurofibrillary tangles eventually occupy the whole of the cytoplasm in certain classes of cell in the neocortex, hippocampus, brain stem, and diencephalon. The number of these tangles, as seen in post mortem histology, correlates with the degree of dementia during life. Some studies suggest that tangle antigens leak into the systemic circulation both in the course of normal aging and in cases of Alzheimer disease.
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 JoVE Behavior

Morris Water Maze Test: Optimization for Mouse Strain and Testing Environment

1Department of Psychology, Behavioral Neuroscience, West Virginia University, 2Department of Physiology and Pharmacology, West Virginia University, 3Department of Neurology, N. Bud Grossman Center for Memory Research and Care, University of Minnesota, 4Department of Neuroscience, N. Bud Grossman Center for Memory Research and Care, University of Minnesota, 5GRECC, VA Medical Center, 6Center for Neuroscience, Center for Basic and Translational Stroke Research, West Virginia University


JoVE 52706

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