Stories tagged fMRI

Oct
23
2008

MRI: This is your brain.  This is your brain scanned.  Any questions?  Actually, this is not exactly what an fMRI looks like, but it is fun with a brain scan/cadbury egg shape.
MRI: This is your brain. This is your brain scanned. Any questions? Actually, this is not exactly what an fMRI looks like, but it is fun with a brain scan/cadbury egg shape.Courtesy Hey Paul
I'm sure you've heard of a polygraph used as a lie detector test, right? What about using a brain scan? No? Well, soon enough you may hear about fMRI's being used as evidence in court! Cephos, a company in Massachusetts, claims that their brain scan can reveal when a person is lying 97% of the time. When a person is lying, the fMRI shows that there is more brain activity occurring than when a person is telling the truth. A different type of brain scan (brain electrical oscillation signature profiling, BEOS) is already used in courts in India, though only as corroborative evidence when there is already primary physical evidence.

Opponents of the fMRI technique say that there have not been adequate scientific testing and review. Additionally, it may be possible to trick the scan. If you plan a lie ahead of time, and rehearse it, your scan may look different than if you made up a lie on the spot.

Neurologists used functional magnetic resonance imaging, or fMRI, to study the brain function of a woman who'd been in a coma for five months. To their surprise, when they asked her to respond to commands or imagine things, her brain "lit up" in the same way that the brains of healthy subjects did. The scientists caution that this is likely not the situation for many vegetative patients.