Humans are known to lie. For some reason or the other, we will find ourselves lying at least one to two times a day. Most of the times we lie as we refuse to take responsibility for our actions. Also sometimes we prefer not to explain to others the reasons for our actions. When we lie, there are internal changes in our body. Lie detector test uses a polygraph machine to monitor and graphically display these changes that occur in our body.
Lie Detector Test – So what happens exactly?
Different parts of our brains are activated. The frontal lobe is the first one to get activated since that is the one that starts working on suppressing the truth or the actual thing that has occurred. There is some anxiety that a person lying starts to feel. This activates the limbic system of the brain. Then the temporal lobe comes into action. This part of the brain that deals with memory storage and retrieval. It goes on to check what exactly occurred as we try to remember what actually happened. Similarly, more parts of the brain are activated as the person tries to work on formulating the plan for lying and what exactly needs to be said. Compared to a person telling a lie, a person telling the truth has a fewer brain cell activated.
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Human brain signals are stronger
Due to the increase in activity in the brain, the brain signals are stronger and hence there is more activity detected when these signals are measured. To be precise, it is the activity in the limbic system that a lie detector test measures. Further, if you also observe the person, the movement of the eyes will also help identify which part of the brain the person is trying to access. Another way to detect if a person is lying is by the feet. Since we are humans, our body or particularly our legs are the first to react in signs of danger, when we are lying we detect danger and start wriggling our feet.
There are different ways to detect lies
Experienced psychologists would be able to detect the lies depending on the symptoms the person displays. The lie detector tests that were considered 100% full proof once upon a time are no longer valid in the court of law. Since with the proper control of body and mind, these changes can be avoided so that they are no longer detectable as major changes in the body. Also the anxiety the person feels while taking the lie detector test could be due to multiple reasons.