QS Study

The cerebrum is the part of the brain involved in the higher levels of thinking and action. It is involved in the control of voluntary and involuntary movement as well as balance. The cerebellum is located behind the top part of the brain stem and is made of two hemispheres.

Blood supply of cerebellum –

Arterial supply: It is supplied by the –

(a) Superior cerebellar artery – branch of the basilar artery. It provides perfusion for the superior cerebellar region along with the superior medullary velum, pineal gland and pons.

(b) Anterior inferior cerebellar artery – branch of the basilar artery. It arises inferior to CN VI at the pontomedullary junction at the proximal part of the basilar artery.

(c) Posteroinferior cerebellar artery – Branch of the vertebral artery. It provides arterial blood to the cerebellar nuclei and its inferior surface (including the vermis).

The Superior cerebellar artery (SCA) and Anterior inferior cerebellar artery (AICA) are branches of the basilar artery, which wraps around the anterior aspect of the pons before reaching the cerebellum. The Posteroinferior cerebellar artery (PICA) is a branch of the vertebral artery.

Blood Supply of Cerebellum 1

Fig: Arterial blood supply of cerebellum

Venous drainage: by –

(a) Superior cerebellar veins – Drain into straight, transverse & superior petrosal sinuses.

(b) Inferior cerebellar veins – Drain into transverse & inferior petrosal sinuses.

Venous drainage of the cerebellum is by the superior and inferior cerebellar veins. They drain into the superior petrosal, transverse and straight dural venous sinuses.

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