Primary waves travel through Earthâs crust at an average speed. of about 5 kilometers per second (3 mi/s). Primary waves can travel. through solids, liquids, and gases. As they pass through a material, the. particles of the material are slightly pushed together and pulled apart.
Why This Occurs. Emotional detachment is usually an issue caused by severe, intense anxiety - most notably panic attacks, although any form of severe anxiety can cause emotional detachment. While it's not entirely clear what causes this detachment, it most likely is a coping mechanism for the brain.
Support. 1  Posterior vitreous detachment (PVD) is a very common eye condition. It's caused by natural changes to the vitreous gel which takes up the space inside the eye. 2  Although PVD causes some frustrating symptoms it doesnât cause pain, harm the eye or cause permanent loss of vision.