AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Torn pica artery11/17/2023 ![]() ![]() Moreover, the three patterns of course of the PICA could reflect the variable retention of the primitive lateral vertebrobasilar anastomosis in the trunk of the definitive PICA, which may be related to its level of origin. Dawn Jankovic, a 47-year-old Ohio resident. The high origin of the PICA from the basilar artery could be ascribed to its development from a rostral collateral of the plexus due to an early development of the vessel at the beginning of its embryonic lifetime. A woman who died after a ride on an Indiana roller coaster was killed by a torn artery, internal bleeding and the normal force of the ride, reports said. Cranial non-contrast CT showing intraventricular hemorrhage and hydrocephalus (a) with a large volume of blood in the cisterna magna and a cerebellar intraparenchymal clot (b).DSA in posterior-anterior (c) and lateral (d) projections. Based on the evolution of the primitive hindbrain plexus, we suggest that in synchrony with the progressive descent of the cerebellum the branches of the myelencephalic plexus succeed with a rostrocaudal progression in feeding the cerebellum and the morphogenesis of the PICA results from the selection of portions of this plexus. Preoperative diagnostic imaging in a ruptured left PICA aneurysm. The three-dimensional reconstruction of the vessels shows that the PICA is not yet defined due to the persistence of a plexus of many thin vessels at the level of the lateral aspect of the myelencephalon, indicating that its origin and course are established at the end of the embryonic period. The examination of the transverse sections shows that the vertebral and basilar arteries, superior cerebellar arteries, anterior inferior cerebellar arteries, and primitive lateral vertebrobasilar anastomoses are well recognizable. Due to the development of the pontine flexure the rhomboid lips approach and the cerebellum comes into contact with the myelencephalon thus the myelencephalic plexus represents an acquired source of vascularization for the cerebellum with respect to the metencephalic plexus. The cerebellar primordium is vascularized by the metencephalic plexus that will form the basilar artery and the superior cerebellar arteries. Three-dimensional reconstruction of the vertebrobasilar system has been performed to study the morphology of the vascular networks. ![]() With the aim of understanding their embryological basis we review the interrelations between the developing cerebellum and the primitive hindbrain arterial plexus through the analysis of transverse serial sections of human embryos of 22.5 and 23 mm crown-rump length. Based on the correlation between the level of origin and the characteristics of the lateromedullary segment, we have proposed three patterns of course of the PICA. The posterior inferior cerebellar artery (PICA) shows the most variable course among the cerebellar arteries, mainly at the level of the lateral medullary segment. ![]()
0 Comments
Read More
Leave a Reply. |