====== 1664 ======

[[1663]]-[[1665]]
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In [[1664]], Thomas Willis first postulated that [[cerebrospinal fluid production]] came from the [[choroid plexus]]es and that the fluid was contained within the [[ventricle]]s
((Rengachary SS, Ellenbogen RG: Principles of Neurosurgery, ed 2. Edinburgh: Elsevier Mosby, 2005))