Circulation Of Cerebrospinal Fluid Diagram
The circulation of cerebrospinal fluid may be obstructed so that it accumulates in the skull.
Circulation of cerebrospinal fluid diagram. A video showing the flow of csf through the ventricular system and the sub arachnoid space. Tiny cilia located on ependymal cells that also produce small amounts of csf help propel the fluid along. Use the chapter headings below to navigate to relevant sections of the video. The choroid plexus in the four ventricles produce csf which is circulated through the ventricular system and then enters the subarachnoid space through the median and lateral apertures.
The pathway of the cerebrospinal fluid is as follows. Cerebrospinal fluid csf is a clear colorless body fluid found in the brain and spinal cord it is produced by specialised ependymal cells in the choroid plexuses of the ventricles of the brain and absorbed in the arachnoid granulations there is about 125 ml of csf at any one time and about 500 ml is generated every day. Cerebrospinal fluid is constantly produced at a secretion rate of 0 2 0 7 ml min meaning that there is 600 700 ml of newly produced csf per day. Radionuclide cerebrospinal fluid csf flow studies or so called radionuclide ventriculography provide a safe physiologic assessment of the functional anatomy of the csf spaces 31 33 csf circulates through the ventricular system and subarachnoid space that surrounds both the brain and spinal cord figure 51 21 normally csf flows anteriorly in the lateral ventricles through the foramen of.
This condition called hydrocephalus may result from congenital stenosis or narrowing of the aqueduct of sylvius tumours meningitis or blood accumulating within the ventricles. B which of the labeled structures carries exclusively sensory information towards the spinal cord. Csf acts as a cushion or buffer providing basic mechanical and. Cerebrospinal fluid circulation begins with the pulsing of the choroid plexus.
Since the total volume of csf averages around 150 270 ml this means that the entire volume of csf is replaced around 4 times per day. Which of the labeled cells in the diagram is a neuroglial cell that produces and assists in the circulation of cerebrospinal fluid. Figure 14 2 5 cerebrospinal fluid circulation. It will eventually circulate throughout the subarachnoid spaces in the brain and spinal cord and then be absorbed into the bloodstream.
Beginning in the lateral ventricles csf flows through two passageways into the third ventricle. Start studying circulation of cerebrospinal fluid csf. Accumulation of cerebrospinal fluid causes massive enlargement of the. Introduction 00 18 csf.
Csf is formed within the ventricles by small delicate tufts of spe cialized tissue called the choroid plexus.