posterior cranial fossa


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Related to posterior cranial fossa: Middle cranial fossa

pos·te·ri·or cra·ni·al fos·sa

[TA]
the internal base of the skull posterior to the crest of the petrous part of the temporal bones and the dorsum sellae and anterior to the grooves for the transverse sinuses, where the cerebellum, pons, and medulla oblongata rest.
Synonym(s): fossa cranii posterior [TA]

posterior cranial fossa

The posteriormost of the three divisions of the internal cranial base, which houses the inferior face of the cerebellum posteriorly and the pons and medulla oblongata anteriorly. The floor of the fossa is the largest and deepest depression of the inner surface of the base of the brain, and is covered by dura mater. The posterior cranial fossa is bounded anteriorly by the dorsum sellae of the sphenoid bone; laterally by the superior margin of the petrous part of the temporal bone and the mastoid angle of the parietal bone; and posteriorly by the squamous part of the occipital bone below the transverse sinuses.

posterior cranial fossa

The posterior third of the floor of the cranial cavity; it is larger and deeper than the anterior and middle cranial fossae. The posterior cranial fossa is formed from the posterior surface of the body of the sphenoid bone (the dorsum sella), the posterior surfaces of the petrous and mastoid portions of the temporal bones, and the inner surfaces of the occipital bones. The posterior cranial fossa contains the internal auditory canals, the foramen magnum, and the jugular foramina. The brainstem, the cerebellum, and the transverse and sigmoid sinuses lie in the posterior cranial fossa.
See also: fossa
References in periodicals archive ?
We found no cases of meningoencephalocele in the posterior cranial fossa. The infrequent defects in the posterior cranial fossa account for the less frequent occurrence of cerebellar abscesses, a type of complication characteristic of acute otitis or purulent hematoma, and usually observed in children.
Where, [SP.sub.posterior cranial fossa] is the total number of points hitting the components of posterior cranial fossa and [SP.sub.intracranial cavity] is the total number of points hitting sectioned surface of intracranial cavity including all parts.
Nicholas D Coppa, Johnny B Delashaw Jr: Reconstruction After Posterior Cranial Fossa Surgery-Case Report of Application of a Synthetic Tissue Sealant to Augment Dural Closure.
Traumatic epidural hematomas of the posterior cranial fossa. Surg Neurol 2008; 69:247-52.
They primarily present in the posterior cranial fossa.1,2 HMBs can arise sporadically or can be associated with von Hippel-Lindau (VHL) disease.
This defect may be congenital or acquired and may be located in the anterior, middle or posterior cranial fossa but will manifest as CSF rhinorrhea.
The tumors will frequently expand into the posterior cranial fossa, ranging up to 10 cm in greatest dimension.
Relation of arteries to roots of nerves in posterior cranial fossa in man.
DISCUSSION: Posterior cranial fossa is the largest cranial fossa.
A cerebral vein congestion, as a result of a dural arteriovenous fistula in the posterior cranial fossa, was reported to be the cause of bithalamic lesion only in one case.9
In fact, the jugular foramen is an opening in the skull that connects the posterior cranial fossa and the jugular fossa.

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