Topic
Collicular artery
About: Collicular artery is a research topic. Over the lifetime, 4 publications have been published within this topic receiving 174 citations.
Papers
TL;DR: The cisternal segments of 15 trochlear nerves in brain stems injected with India ink and fixed in formalin were examined and found to emerge as singular trunks, or two or three roots with or without accessory rootlets.
Abstract: We examined in detail the cisternal segments of 15 trochlear nerves in brain stems injected with India ink and fixed in formalin. The nerves were found to emerge as singular trunks (33.3%), singular trunks with accessory rootlets (13.3%), or two or three roots with (26.7%) or without accessory rootlets (26.7%). The nerves were in close relationship or in contact with the superior cerebellar artery, that is, with the main trunk of the superior cerebellar artery, its medial and lateral terminal stems, the accessory superior cerebellar artery, and the vermian, paravermian, collicular, and lateral hemispheric arteries as well as their small branches. Some of these vessels were connected by anastomoses in 86.7% of the cases. The anastomotic channels varied from 40 to 530 microns in diameter. The cisternal segment of each trochlear nerve was usually supplied by a single long artery, which most often arose from the vermian artery (26.7%) or the collicular artery (26.7%). The feeding vessel ranged from 30 to 80 microns in caliber. We discuss the possible clinical significance of the anatomic data observed in the present study.
68 citations
Journal Article•
TL;DR: In this article, the cisternal segments of 15 trochlear nerve in brain stems injected with India ink and fixed in formalin were examined and found to emerge as singular trunks (33.3%), singular root with (26.7%), or two or three roots with or without accessory rootlets.
Abstract: WE EXAMINED IN detail the cisternal segments of 15 trochlear nerves in brain stems injected with India ink and fixed in formalin. The nerves were found to emerge as singular trunks (33.3%), singular trunks with accessory rootlets (13.3%), or two or three roots with (26.7%) or without accessory rootlets (26.7%). The nerves were in close relationship or in contact with the superior cerebellar artery, that is, with the main trunk of the superior cerebellar artery, its medial and lateral terminal stems, the accessory superior cerebellar artery, and the vermian, paravermian, collicular, and lateral hemispheric arteries as well as their small branches. Some of these vessels were connected by anastomoses in 86.7% of the cases. The anastomotic channels varied from 40 to 530 μm in diameter. The cisternal segment of each trochlear nerve was usually supplied by a single long artery, which most often arose from the vermian artery (26.7%) or the collicular artery (26.7%). The feeding vessel ranged from 30 to 80 μm in caliber. We discuss the possible clinical significance of the anatomic data observed in the present study.
62 citations
TL;DR: The cisternal segment of the oculomotor nerve was most often supplied by the mesencephalic perforators, and vascular penetration was noted in 51.8% of the third nerves.
44 citations
TL;DR: The distal segment of the posterior cerebral artery (PCA), which extends from the junction with the posterior communicating artery to its terminal division into the parieto-occipital and calcarine arteries, was examined in 37 brains and several anatomic variants of thedistal segment were observed.
Abstract: The distal segment of the posterior cerebral artery (PCA), which extends from the junction with the posterior communicating artery to its terminal division into the parieto-occipital and calcarine arteries, was examined in 37 brains Three types of distal segment were distinguished In the first type (429 %), the terminal division was located either in the calcarine sulcus or in the quadrigeminal cistern In the second type (414 %), the terminal division had the same position, but the distal segment, in addition to its terminal stems, also gave off the common temporal artery In the third type (157 %), the terminal division was seen in the ambient cistern The distal segment of the PCA gave rise to several collateral branches: the collicular artery (28 %), the anterior (286 %), middle (300 %), and posterior (286 %) hippocampal arteries, the proximal (829 %) and distal (200 %) lateral posterior choroidal arteries, the proximal (400 %) and distal (414 %) medial posterior choroidal arteries, the peduncular, thalamogeniculate and splenial branches, the lingual gyri artery and the temporal arteries Several anatomic variants of the distal segment were observed in this study: fenestration of the distal segment (14 %), location of the distal segment dorsal to the uncus (28 %), origin of the collicular (28 %) and anterior choroidal arteries (14 %) from the distal segment, and protrusion of the parieto-occipital arterial loop into the lateral ventricle (28 %) The authors discuss the clinical significance of these anatomic data
21 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 1996 | 1 |
| 1994 | 2 |
| 1988 | 1 |