tentorial

Tentorial refers to structures related to the tentorium cerebelli. The tentorium cerebelli is a dural infolding that separates the cerebellum from the occipital and temporal lobes of the cerebrum. It is a crescent-shaped fold of the dura mater, one of the membranes that cover the brain. The tentorium cerebelli is located inferior to the occipital lobes and posterior to the brainstem.

Diseases or conditions affecting the tentorium cerebelli can be described as tentorial. For example, a tentorial meningioma is a tumor that arises from the meninges in the region of the tentorium cerebelli. Lesions in this area can cause a variety of neurological symptoms depending on their size and location, potentially affecting vision, cranial nerve function, or causing increased intracranial pressure. The anatomical position of the tentorium cerebelli is significant in neurosurgery and neuroradiology for localizing and describing lesions. Its presence divides the cranial cavity into supratentorial and infratentorial compartments. This division is clinically important, as herniation of brain tissue can occur either above or below this structure. Understanding the tentorium is crucial for diagnosing and managing neurological conditions.