its only for education purpose.

1. BRAIN FINGERPRINTING
TECHNOLOGY
PRESENTATION BY
ANKIT
ADDMISION NO-15GCEBEI004

2. WHAT IS BRAIN
FINGERPRINTING?
• Brain fingerprinting is a computer based
technology designed to determine hidden
information in individual’s brain by measuring
electrical brain wave responses to words,
phrases, or pictures presented on a computer
screen.
• Brain fingerprints are measured by an EEG
event-related potential, a P300-MERMER.

3. P300
• Specific, measurable
brain response emitted
by the brain of a subject
who has the relevant
information stored in
his brain. It is based on
Oddball Paradigm. Showing the experimental setup

4. Picture/word
shown to an
individual
(Stimulus)
OPERATING MECHANIsM
Triggers neurons
of brain Generates
brainwave
(P300)))
Electrical
Potentials
Accumulate in
brain
(MERMER)
Headgear fitted with
Eletrodes placed on
scalp
P300 –MERMER
(an scalp ERP
EEG)
Measures
brainwaves
Generates anolog
signals
EEG
Amplifier
Study data
Using
computer
program
Found
Guilty/
Not guilty

5. Types of Stimuli Used
• Probes
- Life-experience related
- Relevant to the investigated event -recognizable and noteworthy
only
- for the subjects who had participated in the event (MERMER)
• Targets
-Push a button to indicate known image
- Contains relevant information
-Creates a baseline
• Irrelevant Stimuli
-information relevant to the crime that the suspect claims to have
no
- knowledge of

6. How Brain Waves are used to detect
guilt?
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
Alpha-
Beta-
Theta-
Delta-

7. In this figure the red and blue lines
are closely correlated, suspect
has knowledge of crime
Information regarding the
crime is not known.

8. Phases of Brain Fingerprinting
There are four stages to Brain Fingerprinting:
1. Crime Scene Evidence Collection: Gathering evidences from
crime scenes
2. Brain Evidence Collection: A specialist checks whether the crime
scene evidence matches evidence stored in brain.
3. Computer Evidence Analysis: Computerized analysis is done on
the brain evidences and statistical methods are applied to move to
next phase.
4. Scientific Result: Finding whether the person is guilty or not
guilty

9. Features of Brain Fingerprinting
The interpretation in brain fingerprinting is to look for P300 as response to
stimuli related to crime in question, e.g. a murder weapon or a victim’s
face. signals such as heart rate, sweating and bloo
It is based on EEG signals, the system does not require the testee to issue
verbal response to questions or stimuli
It uses cognitive brain responses, and it does not depend on the
emotions of the subject, nor is it affected by emotional responses
It is different from polygraph(lie-detector), which measures emotion-based
physiological d pressure
Unlike polygraph testing, it does not attempt to determine whether the
subject is lying or telling the truth.

10. The entire Brain Fingerprinting System is under computer
control. The computer control includes:
Presentation of the stimuli
Recording of electrical brain activity
Mathematical data analysis algorithm that
compares the responses of the 3 stimulus
Determination of information present or
information absent

11. Case Studies
• Macon County, Missouri Sheriff Robert Dawson
engaged Dr.Farwell to conduct a Brain Fingerprinting
test on murder suspect James B. Grinder. The test
proved that the record stored in Grinder’s brain
matched the scene of the murder of Julie Helton.
• Brain Fingerprinting could detect trained terrorists
even
before they strike.

12. References
•Farwell LA, Donchin E., “The brain detector: P300 in the
detectionof deception. Psychophysiology”
• Kumar Ravi, “ Brain Fingerprinting ,’’Compusoft-an
international journal of advanced computer technology, 1 (2), Dec-
2012 (Volume-I, Issue-II)
• Farwell LA, Donchin E., “Brain Fingerprinting”
• WikipediaBrain Fingerprinting

13. THANK YOU