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.
Where the plates meet, their relative motion determines the type of boundary: convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries. The lateral relative movement of the plates typically ranges from zero to 100 mm annually.
Lithospheric Plates. The theory of plate tectonics states that the surface of the Earth is composed of a series of fractured plates. The fractured plates making up the crust of the Earth are called lithospheric plates . There are currently seven major lithospheric plates on the surface of the Earth.