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Cranial nerves arising from the midbrain: Clivus, petrous part of temporal bone  posteriorly : The posterior cranial fossa is the most posterior and deep of the three cranial fossae.

Connection to other cranial cavities.

Orbital plate of frontal bone laterally. It contains the brainstem and cerebellum. The posterior cranial fossa, the largest and deepest of the three cranial fossae, lodges the cerebellum, pons, and medulla oblongata (fig. The posterior cranial fossa (latin:

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Connection to other cranial cavities.

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The middle cranial fossa and infratemporal region.

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Tumors in the posterior fossa are considered critical brain lesions, primarily because of the limited space within the posterior fossa and the potential involvement of vital brain stem nuclei.

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Through it the posterior cranial fossa and contained brain become continuous with the vertebral canal and contained spinal cord.

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Posterior cranial fossa anatomy,physiology,tumours,various positions,complications, treatment 4.

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Bones forming the fossa include:

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The posterior cranial fossa is formed mostly by the occipital bone, but the dorsum sellae of the sphenoid marks its anterior boundary centrally (fig.

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With hematomas of the posterior cranial fossa, severe cerebellar swelling or occlusion of csf drainage from the fourth ventricle, the cerebellum and brainstem can be forced either downward through the foramen magnum, or upward through the tentorial hiatus.

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The anterior cranial fossa is the most anterior and the shallowest of the three cranial fossae.