Brain Fingerprinting technique used to determine scientifically
what information is, or is not stored in a particular brain.
Measures the response to the Visual and the Audio stimulus.
Stimulus is a thing or event that evokes a specific functional
reaction in an organ or tissue.
It does this by measuring electrical brainwave responses to
words, phrases, or pictures that are presented on a computer
Brain fingerprinting was invented by Lawrence Farewell.
Brain Fingerprinting technology is based on an electrical signal
known as MERMER.
Farwell's brain fingerprinting originally used the wellknown P300 brain response to detect the brain's recognition of the
Farwell discovered the P300-MERMER ("Memory and
Encoding Related Multifaceted Electroencephalographic
A MERMER is an electrical signal which is part of the brainwave
observed in response to familiar information..
When the brain recognizes something, then there is increase in
neurons activity, so elicit some changes in brain wave signals .
OPERATING MECHANISM :
shown to an
(an scalp ERP
A suspect is tested by looking at three kinds of information
represented by different colored lines :
RED : Information the suspect is expected to know. It
arises due to target type stimulus.
GREEN : Information not to suspect. The irrelevant
stimuli is responsible for this type of brain waves.
BLUE : Information of the crime that only perpetrator
would know. This occurs due to probes.
ONE OF THE TEST CASES OF A SUSPECT
The Following figure shows the RED and BLUE lines are
This indicates the suspect or the criminal has the knowledge
of the CRIME.
STAGES OF BRAIN FINGERPRINTING
Crime Scene Evidence Collection
Brain Evidence collection
Computer Evidence Analysis
FEATURES & APPLICATIONS
Brain fingerprinting" is a computer-based test that is designed to
discover, document, and provide evidence of guilty knowledge regarding
crimes, and to identify individuals with a specific training or expertise
such as members of dormant terrorist cells or bomb makers. The
National Security is one of the applications regarding this.
It has also been used to evaluate brain functioning as a means of
early detection of Alzheimer's and other cognitively degenerative
diseases, and to evaluate the effectiveness of advertising by measuring
brain responses. It is applied in the Medical field.
Basically Brain fingerprinting is not lie detection. It is different from
polygraph(lie-detector), which measures emotion-based physiological
signals such as heart rate, sweating and blood pressure
It can help solve crimes.
Brain fingerprinting detects information-processing brain
responses that reveal what information is stored in the subject's
brain. It does not detect how that information got there.
Brain fingerprinting does not detect lies. It simply detects
information. No questions are asked or answered during a brain
• It would be inappropriate to generalize the results of the
present research because of the small sample of subjects.
• But the 100% accuracy and high confidence level of the
results, however, provide further support for results from
previous research using brain MERMER testing.