Measurement of the Volume of the Posterior Cranial Fossa Using MRI

Volumetric assessment of Posterior cranial fossa in a West African population

“…The posterior cranial fossa or infratentorial fossa, the broadest and deepest of the three fossae, 1 , 2 , 3 is the cavity located between the foramen magnum and the tentorium cerebelli. It is bounded posteriorly by the squamous part of the occipital bone, anteriorly by the clivus, dorsum sellar and posterior aspect of the body of the sphenoid bone, and antero-laterally by petrous and mastoid parts of the temporal bone and the lateral parts of the occipital bone.…”

“… 5 The dural venous sinuses – transverse, sigmoid and occipital sinuses traverse this fossa. 1 The posterior cranial fossa is unique because of three main characteristics. Firstly, it is bounded by relatively tight unyielding structures – tentorium cerebelli superiorly, the bony clivus and petrous anteriorly, and the suboccipital bone postero-inferiorly.…”