Inferior view of the circle of Willis which provides the arterial blood supply to the brain (anterior inferior cerebellar arteries).

Coronal section through the skull reveals a intracerebral hemorrhage. The central large dark area represents the hemorrhage. Note the midline shift.

Inferior view of the circle of Willis which provides the arterial blood supply to the brain (posterior inferior cerebellar arteries).

Inferior view of the circle of Willis which provides the arterial blood supply to the brain (labyrinthine arteries).

Inferior view of the circle of Willis which provides the arterial blood supply to the brain (basilar artery, vertebral arteries and anterior spinal artery).

Inferior view of the circle of Willis which provides the arterial blood supply to the brain (anterior cerebral arteries and anterior communicating artery).

Blood Brain Barrier