Tentorium cerebelli

The tentorium cerebelli is the second largest dural fold after the falx cerebri. It lies in the axial plane attached perpendicularly to the falx cerebri and divides the cranial cavity into supratentorial and infratentorial compartments 1. It contains free and attached margins 2.

The tentorium cerebelli is attached to the falx cerebri at its midline, and this attachment contains the straight sinus. This attachment is more superior than its anterolateral and posterolateral attachments giving it a "tented" appearance 1

The anterior portion contains the deep tentorial notch (or tentorial incisure) which is a U-shaped (concave) free edge and extends anteriorly to attach to the anterior clinoid processes 1 and forms the lateral part of the cavernous sinus 3. The deep tentorial notch allows communication between the supratentorial and infratentorial compartments.

The anterolateral margin attaches to the superior border of the petrous part of the temporal bone. This margin lies inferior to the tentorial notch and extends anteriorly to attach to the posterior clinoid process and contains the superior petrosal sinus 1

The posterolateral margin separates into the two layers of dura and attaches to the edges of the transverse sulci of the occipital bone. As it extends anteriorly it attaches to the posteroinferior angles of the parietal bone 3. At its most posterior aspect it is attached to the internal occipital protuberance 4 and posterolaterally contains the transverse sinus 3

For blood supply and innervation, see dura.

Relations 1, 3
CT
  • non-contrast
    • appreciated best on coronal and sagittal views as a linear structure separating the occipital lobe from the cerebellum (or supratentorial compartment from the infratentorial compartment) 4
    • on coronal views is visible as being continuous with the falx cerebri 
  • contrast-enhanced
    • on axial views tentorial margins best appreciated with IV contrast as uniform linear densities 4

Neuroanatomy
Share article

Article Information

rID: 25219
Section: Anatomy
Synonyms or Alternate Spellings:
  • Tentorium cerebellum

Support Radiopaedia and see fewer ads

Cases and Figures

  • Drag
    Figure 1: red arrows
    Drag here to reorder.
  • Updating… Please wait.
    Loadinganimation

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.