Polystyrene (PS) /ËpÉliËstaÉªriËn/ is a synthetic aromatic polymer made from the monomer styrene. Polystyrene can be solid or foamed. General purpose polystyrene is clear, hard, and rather brittle. It is an inexpensive resin per unit weight.
It is. more prevalent in females than males (1,2). The most common. cause of syncope in young subjects is a reflex syncopal event. that includes stretch syncope (1-3). Stretch syncope is a rare. occurrence that is clinically difficult to distinguish from epilepsy. and may arise while stretching the neck hyperextended in the.
Causes of fainting. Fainting (syncope) is caused by a temporary reduction in blood flow to the brain. Blood flow to the brain can be interrupted for a number of reasons. The different causes of fainting are explained below.eart problems can also interrupt the brain's blood supply and cause fainting. This type of fainting is called cardiac syncope. The risk of developing cardiac syncope increases with age. You're also at increased risk if you have: 1  narrowed or blocked blood vessels to the heart (coronary heart disease).