1 Lie detector tests conducted by certified professionals typically cost $200-$2,000. 2  The length of the test plays a factor in the price, with all-day tests on the high end of the range. 3  Typical two-hour, single-issue polygraph exams are generally $200-$800.ie detector tests, also called polygraph tests, are used to determine whether a person is telling the truth. According to the American Polygraph Association, research has shown standard lie detector tests are 80%-98% accurate.
What Causes Brain and Spinal Cord Tumors in Adults? The cause of most brain and spinal cord tumors is not fully understood, and there are very few well-established risk factors. But researchers have found some of the changes that occur in normal brain cells that may lead them to form brain tumors. Normal human cells grow and function based mainly on the information contained in each cellâs DNA. Brain and spinal cord tumors, like other tumors, are caused by changes in the DNA inside cells. DNA is the chemical that makes up our genes, which control how our cells function. We usually look like our parents because they are the source of our DNA.
One leading theory for the cause of migraines is âcortical spreading depression.â This wave of brain activity that sweeps over the brain, can be seen on an MRI and is blamed for migraine aura and other migraine symptoms. Others believe hyperactivity in the brain stem causes migraines. Because migraines are difficult to control, many people with this disorder often take medication regularly. Overuse of medication can also lead to migraines.