from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Around or surrounding a blood vessel
from the GNU version of the Collaborative International Dictionary of English
- adj. Around the blood vessels.
from The Century Dictionary and Cyclopedia
- Surrounding a vascular structure, as a blood-vessel; inclosing or containing an artery or a vein: as, a perivascular network of sympathetic nervous filaments about an artery.
Instead of throwing the umbilical cord in the wastebasket, parents will have the opportunity to donate their newborn's cord to a national MSC bank where the cord perivascular cells HUCPVCs will be extracted and cryogenically preserved in nitrogen at -200 degrees for 15 to 20 years.
In the perivascular spaces, the pia apparently enters as a mesothelial lining of the outer surface of the space; a variable distance from the exterior these cells become unrecognizable and are apparently lacking, replaced by neuroglia elements.
Between the layers are cleft-like spaces which communicate with the subarachnoid cavity, and a number of bloodvessels which are enclosed in perivascular lymphatic sheaths.
The inner walls of these perivascular spaces seem likewise covered for a certain distance by the mesothelial cells, reflected with the vessels from the arachnoid covering of these vascular channels as they traverse the subarachnoid spaces.
Through these perivascular channels there is probably a small amount of fluid flowing from nerve-cell to subarachnoid space.
The chemical differences between the subarachnoid fluid (product of choroid plexuses and perivascular system) and the ventricular fluid (product of choroid plexuses alone) indicate that the products of nerve-metabolism are poured into the subarachnoid space.
The bloodvessels that enter and leave the brain are surrounded by perivascular channels.
Under the microscope these tumors showed an increase in the interfascicular as well as perivascular fibers, but the nerve-fibers were not increased in size
Under the microscope these tumors showed an increase in the interfascicular as well as perivascular fibers, but the nerve-fibers were not increased in size or number.
Several studies have described apparent vascular-associated cerebral inflammation in children with autism compared to controls including perivascular macrophage and microglia accumulation in post-mortem autistic brain samples
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