Where is the tentorium?
The tentorium cerebelli (Latin for “tent of the cerebellum”) is an invagination of the meningeal layer of the dura mater that separates the occipital and temporal lobes of the cerebral hemispheres from the cerebellum and brainstem.
What is falx and tentorium?
The falx cerebri (or falx) is a scythe-shaped band of dura matter that separates a part of the cerebral hemispheres. Its inferior boundary is defined by the inferior sagittal sinus and straight sinus. The tentorium cerebelli (or tentorium) separates the cerebrum from the cerebellum and brain stem.
What is the function of tentorium?
The tentorium cerebelli functions as a partition, dispelling the burden of weight from supratentorial structures upon inferior brain matter.
What is a tentorial meningioma?
Tentorial meningiomas are rare tumors located along the surface of the tentorium cerebella in the brain. These types of posterior fossa meningiomas can cause headaches, seizures, and difficulty walking.
What is cerebellar tentorium?
The tentorium cerebelli, the second-largest dural reflection, is a crescent-shaped dura fold that extends over the posterior cranial fossa, separating the occipital and temporal cerebral hemisphere from the cerebellum and infratentorial brainstem [1,6].
What is corpus callosum?
Introduction. The corpus callosum is the primary commissural region of the brain consisting of white matter tracts that connect the left and right cerebral hemispheres.
What are the three parts of the lower brain stem?
The brainstem is the structure that connects the cerebrum of the brain to the spinal cord and cerebellum. It is composed of 3 sections in descending order: the midbrain, pons, and medulla oblongata.
What does the tentorium cerebelli attach?
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.
What will happen if the corpus callosum is damaged?
Since each hemisphere controls the opposite side of the body, the brain must coordinate movements with both sides. This coordination is mediated by the corpus callosum. If the corpus callosum is damaged, then signals cannot pass from one hemisphere to the other. This can lead to serious coordination problems.
Which part of the brain sits on the tentorium notch?
The tentorial notch (also known as the tentorial incisure or incisura tentorii) refers to the anterior opening between the free edge of the cerebellar tentorium and the clivus for the passage of the brainstem. The midbrain continues with the thalamus of the diencephalon through the tentorial notch.
Which part of the brain regulates sleep?
The hypothalamus, a peanut-sized structure deep inside the brain, contains groups of nerve cells that act as control centers affecting sleep and arousal.
What is the meaning of tentorium?
an anatomical part resembling a tent or covering. adj., adj tento´rial. tentorium cerebel´li the process of the dura mater supporting the occipital lobes and covering the cerebellum.
What does the tentorium cerebelli do?
The tentorium cerebelli is an arched lamina, elevated in the middle, and inclining downward toward the circumference. It covers the superior surface of the cerebellum, and supports the occipital lobes of the brain.
What is herniation of the tentorium?
Since the tentorium is a hard structure, if there is a volume expansion in the parenchyma above the tentorium, the brain can get pushed down partly through the tentorium. This is called herniation and will often give mydriasis on the affected side, due to pressure on cranial nerve III (N. Oculomotorius).
What happens when the tentorium of the brain expands?
Since the tentorium is a hard structure, if there is an expansion of the volume of the brain or its surrounding matter above the tentorium, such as because of a tumour or bleeding, the brain can get pushed down partly through the tentorium.