Photograph 4: Precast Trim — It is absolutely critical to drain the back surfaces of these trim elements to prevent perched water and
resulting hydrostatic pressure.
Not exact matches
This has been attributed to high - velocity jets of CSF caused by obstruction of the foramen magnum by the herniated portion of the cerebellum and overcrowded brain parenchyma in the caudal occipital region [5] which is hypothesised to set up a
hydrostatic pressure differential between the spinal cord and subarachnoid space and
results in the accumulation of perivascular fluid which eventually forms a syrinx [9].
Accordingly, the local
pressure imbalances and
resulting atmospheric accelerations are much smaller in the vertical orientation than in the horizontal plane, the
result being an atmosphere in approximate
hydrostatic equilibrium (Gill, 1982).
Given the lithostatic and
hydrostatic pressures for 1 — 2 km of overlying geological strata, and our
results that appear to rule out the rapid movement of deep brines to near the surface, we believe that this mechanism is unlikely.