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.
Synonyms: vitreous detachment, vitreous separation. Posterior vitreous detachment (PVD) is the separation of the posterior hyaloid face of the vitreous body from the neurosensory retina. The importance of PVD is that it is common but its symptoms and signs may mimic those of a retinal detachment. PVD is the most common cause of flashes and floaters.