What is Polygraph, Narco Test & Brain Mapping | How it Works |

A polygraph, also known as a lie detector test, is a tool that is used to assess whether someone is telling the truth. It measures physiological responses, such as heart rate, blood pressure, and respiration, while the person being tested is asked a series of questions. The results of the polygraph are used to determine whether the person is being truthful or not. There is some debate about the accuracy of polygraph testing, and it is not considered to be a reliable method for determining truthfulness in all cases.

Brain mapping, also known as neuroimaging, is the use of various techniques to create images of the brain and study its functions. These techniques include computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography (PET). Brain mapping can be used to diagnose brain disorders, study brain development and function, and assess the effectiveness of treatments for brain injuries or disorders. It is a valuable tool in the field of neuroscience and can help scientists and medical professionals better understand the brain and its functions.

A polygraph, also known as a lie detector test, is a tool that is used to assess whether someone is telling the truth. It measures several physiological responses, such as heart rate, blood pressure, respiration, and skin conductivity, while the person being tested is asked a series of questions. The polygraph is typically administered by a trained polygraph examiner who asks the test subject a series of control questions, which are designed to establish a baseline for the subject's physiological responses. The examiner then asks the test subject relevant questions about the issue being investigated, and the subject's responses are compared to the baseline measurements.
The polygraph works on the premise that lying produces psychological arousal, which can be measured by changes in physiological responses. The theory is that when a person is lying, they may experience anxiety or stress, which can cause changes in their physiological responses. However, there is some debate about the accuracy of polygraph testing, and it is not considered to be a reliable method for determining truthfulness in all cases.

Brain mapping, also known as neuroimaging, is the use of various techniques to create images of the brain and study its functions. These techniques include computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography (PET).
CT scans use X-rays to create detailed images of the brain and are often used to diagnose brain injuries or abnormalities. MRI uses a strong magnetic field and radio waves to produce detailed images of the brain and is often used to diagnose brain conditions, such as tumors or strokes. PET scans use radioactive tracers to show how the brain is functioning and are often used to diagnose brain disorders, such as Alzheimer's disease.
Brain mapping can be used to study brain development and function, diagnose brain disorders, and assess the effectiveness of treatments for brain injuries or disorders. It is a valuable tool in the field of neuroscience and can help scientists and medical professionals better understand the brain and its functions.