Brain Fingerprinting (509)

8/7/2019 Brain Fingerprinting (509)

http://slidepdf.com/reader/full/brain-fingerprinting-509 1/18

Presented by

Varun reddy(07U61A509)





Quick Overview� Invented By Dr Lawrence and A. Farwell.

� It¶s a patented technique of proven accuracy in US

government tests.� Ruled Admissible in one US Court as scientific

evidence.

� It has a record of 100% Accuracy.



How it works ?

� On seeing a previously known information, a

specific measurable brain response known as a P300

or MERMER i.e. Memory and Encoding RelatedMultifaceted Electroencephalographic Response, is

elicited by the brain of a subject.



What is P300/ MERMER?

� A MERMER is a part of the brainwave observed

in response to familiar information.

� When the brain recognizes something, neurons are

fired synchronously, eliciting characteristic

changes in brain activity.

� It is these changes, that investigators look for when

trying to determine whether someone recognizes a

particular piece of information.



It incorporates the following

procedure:� A sequence of words, phrases, or pictures is

presented on a video monitor to the subject,

wearing a special headband designed for detectingthe brain wave responses.

� Three types of stimuli are presented:

� 1.Target

2. Irrelevant3. Probe



Continued«� Target : The target stimuli are made relevant and

noteworthy to all subjects.

� Irrelevant : These have no relation to the situationunder investigation.

� Probes : Probes are the stimuli that are relevant to

the situation under investigation.



How it works:A Suspect is tested by looking at three kinds of

information represented by Different colored lines:

-----Red: information the suspect is expected to know.

------Green: information not known to suspect.

-------Blue:information of the crime that only perpetrator

would know.



Example:





Continued� The determination of information absent in one¶s

brain consists of comparing the probe responses to

the irrelevant responses, as both are not familiar tothe subject and do not elicit a P300/MERMER.



Information absent:



Continued� The entire Brain Fingerprinting system is under

computer control, including presentation of the

stimuli, recording of electrical brain activity, amathematical data analysis algorithm that

compares the responses to the three types of

stimuli and produces a determination of

"information absent" or "information present.³



Instrumental Requirements

� personal computer

� a data acquisition board

� a graphics card for driving two monitors from onePC

� a four-channel EEG amplifier system

� software developed by the Brain Fingerprinting

Laboratories for data acquisition and analysis.





Advantages� Identify criminals quickly and scientifically

� Record of 100% accuracy

� Identify terrorists and members of gangs, criminaland intelligence organizations

� Reduce expenditure of money and other resources

in law enforcement

� Reduce evasion of justice.



Conclusion� 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.



Thank you

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Brain Fingerprinting (509)