Which of the following is NOT a type of stroke?

The correct answer is that "Cluster" is not a type of stroke. Stroke is primarily classified into two main categories: ischemic and hemorrhagic.

Ischemic strokes occur when a blood vessel supplying blood to the brain is obstructed, usually due to a blood clot. Hemorrhagic strokes happen when a blood vessel in the brain bursts, leading to bleeding in or around the brain.

Transient ischemic attacks (TIAs) are often referred to as "mini-strokes." They involve temporary periods of neurological dysfunction caused by a brief interruption in blood flow to the brain. While a TIA is not a full-fledged stroke, it is closely related and can serve as a warning sign for future strokes.

The term "cluster," however, is associated with cluster headaches, which are a type of headache disorder and have no direct relation to strokes. Understanding these definitions is crucial for differentiating between various neurological conditions, especially in a primary care paramedic context.