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.
There are two types of thrombotic stroke: 1  Large vessel thrombosis, the most common form of thrombotic stroke, occurs in the brainâs larger arteries.  Small vessel disease (lacunar infarction) occurs when blood flow is blocked to a very small arterial vessel.