Namenda XR. Uses. Memantine is used to treat moderate to severe confusion (dementia) related to Alzheimer's disease. It does not cure Alzheimer's disease, but it may improve memory, awareness, and the ability to perform daily functions.
The lithosphere, which is the rigid outermost shell of a planet (the crust and upper mantle), is broken up into tectonic plates. The Earth's lithosphere is composed of seven or eight major plates (depending on how they are defined) and many minor plates.
Before understanding the entire theory of plate tectonics, we need to take a look at the different layers of the Earth. The Earth is made of of three generic layers: the outside is called the crust, below the crust is the mantle, followed by the innermost core.