Strokes in vertebrobasilar (VB) system (which supplies blood to the back of the brain) may cause a headache at the back of the head or top of the neck. Headache can occur before, during ...

The vertebrobasilar circulation is a closed hydraulic system, and the direction of flow ... the anterior and posterior circulations of the brain through the circle of Willis.

The vertebrobasilar system supplies the brainstem and has branches ... Ischemic stroke is a severe reduction of blood flow to the brain, which initiates a cascade of events that lead to cell ...