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.
Types of brain cancer. Primary brain tumors are tumors that form from cells within the brain. The tumors are categorized by the type of cell in which it first develops. There are over 120 different types of brain tumors (National Brain Tumor Society).The most common primary brain tumors are called gliomas, which originate in the glial (supportive) tissue. About one third of all primary brain tumors and other nervous system tumors form from glial cells.he tumors are categorized by the type of cell in which it first develops. There are over 120 different types of brain tumors (National Brain Tumor Society). The most common primary brain tumors are called gliomas, which originate in the glial (supportive) tissue.