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FIG 2. Normal kinetics of CSF at C2 and C6 levels (volunteer 15).
Caudal flow is represented by negative values. A systolic velocity peak is clearly defined, and it occurs in the first third of the RR cycle duration.
FIG 3. Cystic and pericystic kinetics (patient 1).
A systolic peak is observed in the PCSS and in the cyst, but it occurs sooner in the cyst.
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