petrooccipital fissure
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Fissure — A cleft or groove. A fissure can be normal or abnormal. A fissure in the cerebral cortex is a normal feature. It is a deep fold that involves the entire thickness of the brain wall. A fissure in the anus is distinctly abnormal. It is a painful… … Medical dictionary
synchondrosis — Cartilaginous joint in which two bones are united either by hyaline cartilage or fibrocartilage. SYN: synchondrodial joint [TA]. [Mod. L. fr. G. syn, together, + chondros, cartilage, + osis, condition] anterior intraoccipital s. [TA]… … Medical dictionary
fissura — 1. SYN: fissure. 2. In neuroanatomy, a particularly deep sulcus of the surface of the brain or spinal cord. [L. fr. findo, to cleave] f. antitragohelicina [TA] a fissure in the auricular cartilage between the … Medical dictionary
synchondrosis petrooccipitalis — [TA] petrooccipital synchondrosis: the plate of cartilage in the petrooccipital fissure which helps to unite the basilar portion of the occipital bone and the petrous portion of the temporal bone … Medical dictionary
fissura petrooccipitalis — [TA] petrooccipital fissure: a fissure extending posteriorly from the foramen lacerum to the jugular foramen, between the basioccipital area and the posterior and inner border of the petrous portion of the temporal bone; called also petrobasilar… … Medical dictionary
sinus — 1. [TA] A channel for the passage of blood or lymph, without the coats of an ordinary vessel; e.g., blood passages in the gravid uterus or those in the cerebral meninges. 2. [TA] A cavity or … Medical dictionary
