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venous circulation
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∙ 13y ago
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Where does the csf drain from subarachnoid space?
In the brain we have small protrusions of the arachnoid and subarachnoid space into the venous system. These protrusions are called arachnoid villi or arachnoid granulations and they allow for drainage of CSF into the venous system. Another source of CSF drainage is the lymphatic system.
Between what 2 layers is the CSF found?
pia mater and the arachnoid
What does the superior sagital sinus drain into?
The superior sagittal sinus is an area above/behind the brain, which allows blood veins to span the area, from the top of the head towards the back. It is believed that the CSF drains through the arachnoid villi into the dural venous sinuses of the superior sagittal sinus. The CSF then drains into the internal jugular veins.
What order do the meninges occur from superficial to deep?
dura mater- this is the strongest outermost covering and external to it is epidural space filled with adipose and veins arachnoid mater- is a web-like middle cover and deep to it lies the subarachnoid space which is filled with CSF pia mater- is the very thin innermost covering and clings tightly to the brain and spinal cord
Is glucose found in CSF fluid?
Yes. Glucose is found there in CSF fluid. CSF glucose level is commonly done by your doctor.
What function reabsorbs cerebral spinal fluid back into the blood?
arachnoid granulations Normally the pressure of the CSF is higher than that of the venous system, so CSF flows through the arachnoid villi and granulations into the blood
How is most of the CSF absorbed?
Most of the fluid is absorbed back into the bloodstream through vessels lining branched projections from the arachnoid membrane called arachnoid villi, or granulations. These arachnoid granulations extend into the dura
Where does the csf drain from subarachnoid space?
In the brain we have small protrusions of the arachnoid and subarachnoid space into the venous system. These protrusions are called arachnoid villi or arachnoid granulations and they allow for drainage of CSF into the venous system. Another source of CSF drainage is the lymphatic system.
How much of cerebroespinal fluid in circulation?
The CSF(cerebrospinal fluid ) is produced at a rate of 500 ml/day. Since the brain can contain only 135 to 150 ml, large amounts are drained primarily into the blood through arachnoid granulations in the superior sagittal sinus. Thus the CSF turns over about 3.7 times a day.
Between what 2 layers is the CSF found?
pia mater and the arachnoid
What will be the result if the fourth ventricle is blocked?
if the fourth ventricle is blocked it will result in accumulation of CSF and there is no drainage of CSF into the sub -arachnoid space.
Where is the csf found in relation to the meninges?
The CSF is found beneath the third layer of meninges, the Arachnoid matter, in an area called the Subarachnoid Space.
What fluid is contained in the arachnoid and pia mater?
Well, technically between the arachnoid mater and the pia mater is the SUBARACHNOID space. This is where the cerebrospinal fluid (CSF) is located.
What are finger like structures that project into the dural sinuses to allow drainage of the csf?
arachnoid villi
The capillaries of what reabsorb cerebral spinal fluid?
Cerebrospinal fluid (CSF) is resorbed via the arachnoid villi and granulations within the subarachnoid space would be, I think, the best answer. Arachnoid fibers extend down within the subarachnoid space to attach to the pia mater. However, according to Afifi et al, in Functional Neuroanatomy, although arachnoid fibers appear to constitute the primarysites for CSF resorption, alternative sites can include: adventitia of leptomeningeal blood vessels, cranial and spinal nerve root sleeves, capillary endothelium, choroid plexus, leptomeningeal vessels, perineural sheaths of cranial and spinal nerves, and, ependyma of the ventricles. Patricia Murphy, SPTA Kalamazoo MI
What damage is caused by swelling of the meninges which interferes with the normal absorption of CSF by blood vessels?
Swelling of the meninges may interfere with the normal absorption of CSF by blood vessels, causing accumulation of CSF and damage from the resulting pressure on the brain.
What is the sructure that is valve like and protrudes externally through the dura mater to absorb csf into venous blood is?
arachnoid villi
