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.
A stroke comes in two forms: 1  Ischaemic stroke: this is the most common type of stroke, which occurs when the bloody supply to the brain is blocked. 2  This is usually caused by atherosclerosis, which causes deposits of fat to collect in the arteries and obstructs blood flow.