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NPR : Neuroscientist Uses Brain Scan to See Lies Form - med upenn

NPR : Neuroscientist Uses Brain Scan to See Lies Form - med upenn 2025

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The document discusses Daniel Langleben's innovative approach to lie detection using functional magnetic resonance imaging (fMRI) to observe brain activity during deception. Unlike traditional polygraphs, which measure physiological responses, Langleben's method tracks specific brain regions that become active when a person lies. The article also highlights the commercial interest in this technology, particularly by a company called No Lie, which offers fMRI tests for individuals seeking to prove their honesty. However, ethical concerns and limitations of the technology are raised, including its reliability and potential medical implications.

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What is brain-based lie detection?

Brain-based lie detection uses functional MRI (fMRI) to examine correlates of brain activity while an individual responds to questions. Science shows that for most individuals there are distinct and reliably different constellations of brain regions active during truth telling compared to lie telling.

What are brain waves in lie detection?

Brain fingerprinting (BF) is a lie detection technique which uses brain waves from a electroencephalography (EEG) to determine whether specific information is stored in the subjects cognitive memory. It was invented by Larry Farwell, a Harvard-graduated neuroscientist, and published in 1995.

What part of your brain do you use when lying?

All this deciding and self-control implies that lying is managed by the prefrontal cortexthe region at the front of the brain responsible for executive control, which includes such processes as planning and regulating emotions and behavior.

How accurate is a brain scan?

The accuracy of the modalities used for the scan was evaluated and a comparison was made between the CT and MRI. It was found that CT detected brain disorders in 1650 cases out of 2105 and accuracy was found (78%). Moreover, MRI detected brain disorders in 776 cases out of 1050, and accuracy was found 74%.

What is the difference between a polygraph and an fMRI?

Polygraph measures reflect complex activity of the peripheral nervous system that is reduced to only a few parameters, while fMRI is looking at thousands of brain clusters with higher resolution in both space and time, said the studys lead author, Daniel D. Langleben, MD, a professor of Psychiatry.

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How accurate is AI lie detection?

Trained on a data set of transcripts in which people were established as having lied or told the truth, the machine-learning model then tells you whether a statement is deceptive. ing to its creators, its textual analysis is accurate 80 percent of the time.

Why does the prefrontal cortex light up when lying?

Executive control includes cognitive processes such as planning, problem solving, and attention all important components of deception so its no surprise the prefrontal cortex is active when we lie. Dishonesty requires the brain to work harder than honesty, and this effort is reflected by increased brain activity.

NPR : Neuroscientist Uses Brain Scan to See Lies Form - med upenn 2025

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