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.
Here are some key points about stroke. More detail and supporting information is in the main article. 1  During a stroke, the brain does not receive enough oxygen or nutrients, causing brain cells to die.  There are three main kinds of stroke: ischemic strokes, hemorrhagic strokes and transient ischemic attacks.