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Pan Liangz - One of the best experts on this subject based on the ideXlab platform.

  • clinical study of Tentorium cerebelli hiatus incision for prevention of cerebral infarction after severe traumatic brain injury
    Journal of Traumatic Surgery, 2014
    Co-Authors: Pan Liangz
    Abstract:

    Objective To explore the value of Tentorium cerebelli hiatus incision in preventing cerebral infarction after operation for severe traumatic brain injury.Methods Totally 120 patients with severe traumatic brain injury who were admitted into our hospital from Jan.2011 to Jan.2013 were divided into 2 groups:treatment group(n =60) treated with the removal of hematomas,decompressive craniotomy and Tentorium cerebelli hiatus incision,and control group(n = 60) with the same treatment except for Tentorium cerebelli hiatus incision.All patients underwent head CT after operation.The incidence of cerebral infarction,intracranial pressure index,the dosage of mannitol and Glasgow Outcome Scale were compared and statistically analyzed.Results The incidence of cerebral infarction(6.7%),intracranial pressure index(11.30 ± 2.62),the application times of mannitol(34.00 ± 2.90) in the treatment group were lower than those in the control group[13.3%,(15.70 ± 2.65),(45.38 ± 3.42),respectively](P 0.05).Glasgow Outcome Scale was obviously better in the treatment group than that in the control group(P 0.05).Conclusion Tentorium cerebelli hiatus incision is a good approach for the treatment of severe traumatic brain injury,which can reduce the incidence of cerebral infarction and improve patients' survival and prognosis.

Peter Kim Nelson - One of the best experts on this subject based on the ideXlab platform.

  • Dural Venous Channels: Hidden in Plain Sight-Reassessment of an Under-Recognized Entity.
    AJNR. American journal of neuroradiology, 2020
    Co-Authors: Maksim Shapiro, K. Srivatanakul, Eytan Raz, M. Litao, Erez Nossek, Peter Kim Nelson
    Abstract:

    BACKGROUND AND PURPOSE: Tentorial sinus venous channels within the Tentorium cerebelli connecting various cerebellar and supratentorial veins, as well as the basal vein, to adjacent venous sinuses are a well-recognized entity. Also well-known are “dural lakes” at the vertex. However, the presence of similar channels in the supratentorial dura, serving as recipients of the Labbe, superficial temporal, and lateral and medial parieto-occipital veins, among others, appears to be underappreciated. Also under-recognized is the possible role of these channels in the angioarchitecture of certain high-grade dural fistulas. MATERIALS AND METHODS: A retrospective review of 100 consecutive angiographic studies was performed following identification of index cases to gather data on the angiographic and cross-sectional appearance, location, length, and other features. A review of 100 consecutive dural fistulas was also performed to identify those not directly involving a venous sinus. RESULTS: Supratentorial dural venous channels were found in 26% of angiograms. They have the same appearance as those in the Tentorium cerebelli, a flattened, ovalized morphology owing to their course between 2 layers of the dura, in contradistinction to a rounded cross-section of cortical and bridging veins. They are best appreciated on angiography and volumetric postcontrast T1-weighted images. Ten dural fistulas not directly involving a venous sinus were identified, 6 Tentorium cerebelli and 4 supratentorial. CONCLUSIONS: Supratentorial dural venous channels are an under-recognized entity. They may play a role in the angioarchitecture of dural arteriovenous fistulas that appear to drain directly into a cortical vein. We propose “dural venous channel” as a unifying name for these structures.

Michael J. Fagan - One of the best experts on this subject based on the ideXlab platform.

  • an assessment of the role of the falx cerebri and Tentorium cerebelli in the cranium of the cat felis silvestris catus
    Journal of the Royal Society Interface, 2018
    Co-Authors: Victor Selles De Lucas, Flora Groning, Alana C Sharp, Hugo Dutel, Susan E. Evans, Peter J Watson, Michael J. Fagan
    Abstract:

    © 2018 The Author(s). The falx cerebri and the Tentorium cerebelli are two projections of the dura mater in the cranial cavity which ossify to varying degrees in some mammalian species. The idea that the ossification of these structures may be necessary to support the loads arising during feeding has been proposed and dismissed in the past, but never tested quantitatively. To address this, a biomechanical model of a domestic cat (Felis silvestris catus) skull was created and the material properties of the falx and Tentorium were varied for a series of loading regimes incorporating the main masticatory and neck muscles during biting. Under these loading conditions, ossification of the falx cerebri does not have a significant impact on the stress in the cranial bones. In the case of the Tentorium, however, a localized increase in stress was observed in the parietal and temporal bones, including the tympanic bulla, when a non-ossified Tentorium was modelled. These effects were consistent across the different analyses, irrespective of loading regime. The results suggest that ossification of the Tentorium cerebelli may play a minor role during feeding activities by decreasing the stress in the back of the skull.

  • an assessment of the role of the falx cerebri and Tentorium cerebelli in the cranium of the cat felis silvestris catus
    Journal of the Royal Society Interface, 2018
    Co-Authors: Victor Selles De Lucas, Flora Groning, Alana C Sharp, Hugo Dutel, Susan E. Evans, Peter J Watson, Michael J. Fagan
    Abstract:

    The falx cerebri and the Tentorium cerebelli are two projections of the dura mater in the cranial cavity which ossify to varying degrees in some mammalian species. The idea that the ossification of these structures may be necessary to support the loads arising during feeding has been proposed and dismissed in the past, but never tested quantitatively. To address this, a biomechanical model of a domestic cat (Felis silvestris catus) skull was created and the material properties of the falx and Tentorium were varied for a series of loading regimes incorporating the main masticatory and neck muscles during biting. Under these loading conditions, ossification of the falx cerebri does not have a significant impact on the stress in the cranial bones. In the case of the Tentorium, however, a localized increase in stress was observed in the parietal and temporal bones, including the tympanic bulla, when a non-ossified Tentorium was modelled. These effects were consistent across the different analyses, irrespective of loading regime. The results suggest that ossification of the Tentorium cerebelli may play a minor role during feeding activities by decreasing the stress in the back of the skull.

Paramasivam Palaniappan - One of the best experts on this subject based on the ideXlab platform.

  • Tentorial venous sinuses: an anatomic study.
    Neurosurgery, 1998
    Co-Authors: Natarajan Muthukumar, Paramasivam Palaniappan
    Abstract:

    OBJECTIVE: Certain neurosurgical procedures require sectioning of the Tentorium cerebelli. The presence of venous sinuses within the Tentorium makes these procedures difficult. The aim of this study was to investigate the incidence, size, location, configuration, and pattern of venous drainage of these sinuses. METHODS: The Tentorium cerebelli was studied in 80 fresh cadavers. After the skull cap and the supratentorial portion of the brain were removed, the Tentorium was inspected for the presence of venous sinuses. Their location, size, configuration, and pattern of venous drainage were noted. Subsequently, the infratentorial structures were removed via the tentorial incisura. The tentorial sinuses were again studied. In certain cases, the sinus was opened and a probe passed inside to confirm its presence. RESULTS: The Tentorium cerebelli was revealed to contain sinuses in 86% of the cadavers. These sinuses were classified into the following three types: Type I sinuses constituted 25% of the total and were most often located in the medial one-third of the Tentorium. They were larger than the other types, frequently occurring with a branching stag-horn configuration and a tendency to drain into the straight sinus, the torcular herophili, and the medial one-third of the transverse sinus. Type II sinuses constituted 25% of the total and were most often located in the lateral one-third of the Tentorium. They were smaller than the other types, and tended to drain into the duction of the transverse sinus and superior petrosal sinus and into the lateral one-third of the transverse sinus. Type III sinuses constituted 50% of the total and were located in the medial one-third of the Tentorium. Their size ranged from small to medium. Unlike Type I sinuses, no branching pattern was observed. These sinuses tended to drain into the straight sinus, the torcular herophili, and the medial one-third of the transverse sinus. In the present study, the medial one-third of the Tentorium was observed to be the most vascular part. No venous sinus was observed in the anterior part of the Tentorium. CONCLUSION: Venous sinuses are common in the Tentorium cerebelli. In this study, they were observed in 86% of the cases. They can be classified into three types, based on their location, size, configuration, and pattern of drainage. The medial one-third of the Tentorium is the most vascular part. A knowledge of these sinuses may be helpful while sectioning the Tentorium. The importance of these sinuses in treating vascular and neoplastic diseases of the brain is highlighted. A brief review of the embryology of these sinuses is also presented.

Belinda L. Baxter - One of the best experts on this subject based on the ideXlab platform.