epithelial cilium movement involved in extracellular fluid movement nervous system process cerebrospinal fluid circulation https://github.com/geneontology/go-ontology/issues/17181 cerebrospinal fluid flow GO:0090660 2015-09-11T15:49:59Z tb CSF circulation biological_process The neurological system process driven by motile cilia on ependymal cells of the brain by which cerebrospinal fluid circulates from the sites of secretion to the sites of absorption. In ventricular cavities, the flow is unidirectional and rostrocaudal, in subarachnoid spaces, the flow is multi-directional. CSF flow