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Check the first two or three minutes of this spinal cord operation. Before the dura is opened you can see the csf  (and cord?) moving through the membrane (around 0.30 plus). When the dura and then arachnoid is opened the flow of csf is clearly visible (around 2.10 to 3.00 plus)

This is a view of the exposed thoracic spinal cord with an abnormal vessel. As the surgeon cuts the abnormal vessel, you can see the pulsing of csf around the cord.

(Thanks to Ciara Dhiomasaigh, biodynamic craniosacral therapist in Galway, for the latter video)

Below are some interesting quotes on CSF flow from recent research using new computer modelling of CSF flow in the third ventricle from MRI scans. There are also some great images on the site of Dr Vartan Kurtcuoglu. (Many thanks to GP Visser, dentist and current student on the current CTET training, for pointing out the papers.)

‘Unlike the cardiac system, there is no dedicated pump, such as the heart, that directly drives the CSF flow. The CSF is propelled in a pulsatile manner, primarily due to brain motion caused by the expansion and contraction of cerebral blood vessels. Superimposed on this motion is flow generated by the secretion of CSF by the choroid plexus in the ventricles at the center of the brain and cerebrospinal fluid absorption, predominantly at the arachnoid villi in the subarachnoid space that surrounds the brain (Davson and Segal, 1996). Additional drainage into the blood-stream is purported to occur through the cerebral extracellular space (Greitz, 1993).’ (Kurtcuoglu et al 2007)

‘The CSF further serves as an intermediary between blood and nervous tissue, providing the latter with nutrients and removing waste products. Recent research shows that the cerebrospinal fluid flow is much more important than previously believed. For example, the pituitary gland and hypothalamus communicate through the CSF and new neurons follow the flow of cerebrospinal fluid in the adult brain.’ (Kurtcuoglu 2011)

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