Which of the following is NOT one of the three types of strokes?

The correct answer is ischemic, as it does indeed represent one of the types of strokes, contrasting with the other provided options. Strokes are categorized primarily into three types: thrombic, embolic, and hemorrhagic.

Thrombic strokes occur due to a blood clot that forms in an artery supplying blood to the brain, while embolic strokes occur when a blood clot formed elsewhere in the body travels to the brain, blocking a blood vessel. Hemorrhagic strokes involve bleeding in or around the brain due to a ruptured blood vessel, often exacerbated by conditions like high blood pressure or aneurysms.

Hence, ischemic strokes, which encompass both thrombic and embolic strokes, are an integral part of stroke classification and represent a significant portion of the strokes that occur. Thus, identifying ischemic as not being one of the three distinct types is not accurate, as it is fundamentally associated with the mechanisms leading to stroke.