What attaches to the clinoid processes?
In the sphenoid bone, the posterior border, smooth and rounded, is received into the lateral fissure of the brain; the medial end of this border forms the anterior clinoid process, which gives attachment to the tentorium cerebelli; it is sometimes joined to the middle clinoid process by a spicule of bone, and when this …
What attaches to posterior Clinoid process?
The posterior clinoid processes deepen the sella turcica, and give attachment to the tentorium cerebelli.
What does anterior clinoid process mean?
Abstract. Background: The anterior clinoid process (ACP) is located close to the optic nerve, internal carotid artery, ophthalmic artery, and can be easily injured in an ACP-related surgery. An anatomical study clearly defining the ACP is of great importance.
What is the tentorium?
The tentorium is a tent-shaped duplicated fold of meningeal dura that attaches to the sphenoid bone anteriorly, the petrous temporal bone laterally, and the squamous part of the occipital bone posteriorly. It attaches to the anterior and PCPs of the sphenoid bone via anterior and posterior petroclinoid ligaments (Fig.
Where does tentorium cerebelli attach?
The fixed margins of the tentorium cerebelli are attached to the superior borders of the petrous part of the temporal bone, known as the posterior clinoid process via the anterior and posterior petroclinoid folds (Figure 4) and along the transverse sinuses grooves on the occipital bone posteriorly.
Is the posterior Clinoid process part of the sella turcica?
‘Sella turcica’ indicates the pituitary fossa on the upper surface of the sphenoid body, defined anteriorly by two anterior clinoid processes and posteriorly by two posterior clinoid processes, the former being parts of lesser wings of the sphenoid bone and the latter the posterior boundary of the sella turcica of the …
Where are anterior Clinoid processes found?
The anterior clinoid process (ACP) is a bony structure on the superolateral aspect of the sphenoid sinus lying between the internal carotid artery and the optic nerve.
What is the function of tentorium cerebelli?
The tentorium cerebelli functions as a partition, dispelling the burden of weight from supratentorial structures upon inferior brain matter. Clinicians and neurosurgeons, when assessing pathological findings, should have knowledge regarding the tentorium cerebelli anatomy.
Where does the posterior clinoid process cross the tentorium?
The periphery of the tentorium cerebelli (attached to the superior border of the petrous temporal bone), crosses under the free border of the tentorial incisure at the apex of the petrous temporal bone, and continues forwards to the posterior clinoid process as a rounded ridge of dura mater, the posterior petroclinoidal ligament.
Where is the tentorium cerebelli located?
The tentorium cerebelli (Fig. 8.32) is a horizontal projection of the meningeal dura mater that covers and separates the cerebellum in the posterior cranial fossa from the posterior parts of the cerebral hemispheres. It is attached posteriorly to the occipital bone along the grooves for the transverse sinuses.
What part of the falx cerebri does the tentorium attach to?
At the midline, the tentorium adheres to the posterior region of the falx cerebri, which lies elevated compared to the lateral and posterior attachments of the tentorium to the skull. The free margin of the tentorial notch is convex downward while the posterior slopes upwards.
What is the degree of tentorial ossification in different mammals?
Klintworth [4] also found differences in the degree of tentorial ossification amongst various mammals. In his study, he found that in adult cats, the entire tentorium cerebelli was completely ossified. But, in dogs, dolphins, minks, porpoises, and wallabies, the ossification was limited to the posteromedial portion of the tentorium.