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. 2021 Dec 24;18:61. doi: 10.1186/s12987-021-00296-7

Fig. 4.

Fig. 4

Changes in CSF hydrodynamic properties due to body position shift. A CSF volume exchanged at craniocervical level during one cardiac cycle (systole or diastole) in both body positions. Notice the difference in directionality. B CSF peak velocity measured during diastole and systole in supine and upright positions. Notice how significant difference in CSF peak velocity is observed between supine and upright position in diastole (**** = p < 0.0001) but are not significantly different in systole (ns = not significant)