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. 2022 Aug 9;13:951018. doi: 10.3389/fneur.2022.951018

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Copyright © 2022 Kheram, Pfender, Boraschi, Farshad, Kurtcuoglu, Curt, Schubert and Zipser.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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T2-weighted MRI of the cervical spine for ID2 (patient with degenerative cervical myelopathy, mJOA: 17) (A). Sagittal and axial images showing spinal canal stenosis maximum at level C4/5, without clear cord compression. CSFP is shown during the Queckenstedt's test in neutral head position (rise, 15.2 mmHg) (B), which declines in head reclination (rise, 7.2 mmHg) (C). Cardiac-driven CSFP peak-to-trough amplitude (CSFPp) at resting state (blue dots) and during the Queckenstedt's test (black dots) is plotted against mean CSFP (D). The regression line (in black) is reported as relative pulse pressure coefficient (RPPC-Q). In neutral head position, RPPC-Q is 0.12 (D), and, in head reclination, it declines to −0.02 (E).