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Detailed observations of pulsatile movements within the cranial and spinal CSF spaces have been made at myelography, pneumoencephalography and Myodil ventriculography; most of them on normal or near-normal patients; but some in cases of obstruction. The effects of the pulsatile movement on CSF circulation, on cyst formation and in cases of obstruction, particularly at the foramen magnum and tentorial opening, are discussed.
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G. H. du Boulay (1966) studied this question.
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