Burt T B, Seeger J F, Carmody R F, Yang P J
Radiology. 1986 Feb;158(2):546-7. doi: 10.1148/radiology.158.2.3753627.
Inward buckling of the dura at C1-2 may occasionally occur with hyperextension of the neck and can result in a difficult or unsuccessful puncture when the posterior lateral C1-2 approach is used for cervical myelography. In this circumstance, placement of the head in a neutral or slightly flexed position may widen the posterior subarachnoid space and facilitate the needle puncture.
