That is, a pulse with an upward displacement will reflect off the end and return with a downward displacement.
2.
For example, an increase in lesion volume ( e . g . epidural hematoma ) will be compensated by the downward displacement of CSF and venous blood.
3.
On the other hand, if adiabatic decrease or increase in density is " greater " than in the ambient fluid, the upwards or downwards displacement will be met with an additional force in the same direction exerted by the ambient fluid.
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