Tentorium Cerebelli: Anatomy And Function

Tentorium Cerebelli: Anatomy And Function

Briefly describe Tentorium Cerebelli.
Answer.

Tentorium cerebelli is a tent-shaped fold of dura mater, which forms the roof of the posterior cranial fossa. It separates the cerebellum from the occipital lobes of the cerebrum.

Tentorium Cerebelli Features It has two margins and two surfaces.

Tentorium Cerebelli Margins

• The inner free margin is U-shaped and encloses the tentorial notch for the passage of the midbrain. The anterior ends of the concave free margin are attached to the anterior clinoid processes.
• The outer attached margin is convex and attached on each side (from anterior to posterior) to the posterior clinoid process, superior border of petrous temporal bone, posteroinferior angle of parietal bone and lips of transverse sulcus on occipital bone.

Tentorium Cerebelli Surfaces

• The convex upper surface slopes on either side from the median plane. In the median plane, it provides attachment to falx cerebri.
• The concave inferior surface provides attachment to the falx cerebelli in its posterior part.

Venous Sinus Enclosed In Tentorium Cerebelli

• Superior petrosal sinus within the anterolateral part of the attached margin.
• Transverse sinus within the posterior part of the attached margin.
• Straight sinus along the line of attachment between falx cerebri and tentorium cerebelli.