Search results
Results from the WOW.Com Content Network
The superior cerebellar veins pass partly forward and medialward, across the superior cerebellar vermis.They end in the straight sinus, [1] and the internal cerebral veins, partly lateralward to the transverse and superior petrosal sinuses.
Dural venous sinuses bordered by hard meninges (shown in blue) direct blood outflow from cerebral veins to the internal jugular vein at the base of skull. Cerebral blood flow (CBF) is the blood supply to the brain in a given period of time. [8] In an adult, CBF is typically 750 millilitres per minute or 15.8 ± 5.7% of the cardiac output. [9]
The cerebellum is divided into an anterior lobe, a posterior lobe, and the flocculonodular lobe. [32] The anterior and posterior lobes are connected in the middle by the vermis. [33] Compared to the cerebral cortex, the cerebellum has a much thinner outer cortex that is narrowly furrowed into numerous curved transverse fissures. [33]
This continuous flow into the venous system dilutes the concentration of larger, lipid-insoluble molecules penetrating the brain and CSF. [9] CSF is normally free of red blood cells and at most contains fewer than 5 white blood cells per mm 3 (if the white cell count is higher than this it constitutes pleocytosis and can indicate inflammation ...
[4] [5] [6] Modern imaging methodology, including MR scanning, have detailed the anastomoses of the cerebral and spinal venous systems in the suboccipital region. [7] [8] Batson, and others had recognized that blood flow in the cerebrospinal venous system was bi-directional, a unique feature that was enabled by a general lack of venous valves ...
Glymphatic flow was initially believed to be the complete answer to the long-standing question of how the sensitive neural tissue of the CNS functions in the perceived absence of a lymphatic drainage pathway for extracellular proteins, excess fluid, and metabolic waste products.
Cranial venous outflow obstruction, also referred to as impaired cranial venous outflow, impaired cerebral venous outflow, cerebral venous impairment is a vascular disorder that involves the impairment of venous drainage from the cerebral veins of the human brain. [1] [2] The cause of cranial venous outflow obstruction is not fully understood.
The granulations exhibit a thinner stalk that penetrates through the wall of a venous sinus, and a distended head formed within the lumen of the sinus. The head consists of a trabecular collagenous core that is largely covered by a dural cupula, except for an apical cap — some 0.3 mm in diameter — of arachnoid cells attached directly to the ...