Table 2 Summary of the cardiac- and respiratory-driven CSF displacements (cm) in the cranial and caudal directions for the three different respiratory periods
Respiratory period (s) | Cranial | Caudal | ||
|---|---|---|---|---|
Cardiac | Respiratory | Cardiac | Respiratory | |
Sylvian aqueduct | ||||
 6 | 0.051 ± 0.022 | 0.124 ± 0.023 | −0.049 ± 0.019 | −0.121 ± 0.024 |
 10 | 0.054 ± 0.027 | 0.138 ± 0.043 | −0.052 ± 0.023 | −0.140 ± 0.052 |
 16 | 0.054 ± 0.025 | 0.147 ± 0.054 | −0.053 ± 0.024 | −0.156 ± 0.058 |
Foramen magnum | ||||
 6 | 0.319 ± 0.154 | 0.505 ± 0.314 | −0.313 ± 0.147 | −0.489 ± 0.325 |
 10 | 0.334 ± 0.169 | 0.614 ± 0.355 | −0.331 ± 0.169 | −0.670 ± 0.362 |
 16 | 0.308 ± 0.133 | 0.501 ± 0.281 | −0.308 ± 0.132 | −0.572 ± 0.424 |