Magma: Magma, molten or partially molten rock from which igneous rocks form. It usually consists of silicate liquid, although carbonate and sulfide melts occur as well. Magma
There are three main types of stroke: transient ischemic attack, ischemic, and hemorrhagic. Itâs estimated that 87 percent of strokes are ischemic. Doctors also call a transient ischemic attack (TIA) a warning or ministroke. A clot that temporarily blocks blood flow to your brain causes a TIA.
According to the American Stroke Association (ASA), strokes can be classified into 2 main categories: 1  87% are ischemic strokes. These are strokes caused by blockage of an artery (or, in rare instances, a vein). 2  13% are hemorrhagic strokes. These are strokes caused by bleeding.