In agricultural tractors for example, as a general rule 40 to 50 percent of the value of the machine will be lost in the first quarter of the machine's life and by the halfway point of lifetime, from 70 to 75 percent of the value will be lost.
People with PTSD may feel constantly alert after the traumatic event. This is known as increased emotional arousal, and it can cause difficulty sleeping, outbursts of anger or irritability, and difficulty concentrating. They may find that they are constantly on guard and on the lookout for signs of danger.
Cleveland_Clinic_Host: Syncope -- also called fainting, blacking out, or passing out -- is a sudden loss of consciousness, followed by a fall from a standing or sitting position. It is a condition that is caused by a decrease in blood flow to the brain. Blood contains oxygen, so when blood flow to the brain decreases, oxygen to the brain also decreases. Certain heart or brain conditions and a sudden change in position may cause syncope. Signs and symptoms include light-headedness, dizziness, cold sweaty skin, and feeling more tired than usual.