BRAIN MACHINE INTERFACE
by suvarcha sharma
2EC 3rd year
Introduction to BMI
The human brain
Model of BMI
What is EEG ?
How does BMI works????
1. Introduced in 1924 by HANS
2. BRAIN MACHINE INTERFACE
(BMI) is a direct communication
pathway between a brain and an
• BMI uses brain activity to command,
control, actuate and communicate with the
world directly through brain integration
with peripheral devices and systems.
• Main principle behind this interface is the
bioelectrical activity of nerves and
THE HUMAN BRAIN
Brain is composed of millions of neurons. When
the neuron fires, or activates, there is a voltage
change across the cell which generates signals on
the surface of the brain. By monitoring and
analyzing these signals we can understand the
working of brain.
EEG IS MEASUREMENT OF
PRODUCED BY BRAIN AS
ELECTRODES PLACED ON
An electroencephalogram (EEG) is a
measure of the brain's voltage fluctuations
as detected from scalp electrodes
It is an approximation of the cumulative
activity of neurons
It is the foundation of current BMI
HOW BMI WORKS???
• It sound like science fiction but is a clever app of
science and technology. the system does not really
read thoughts; rather, it measures fluctuations in
electrical voltage in the brain and translates them
into commands on a computer screen.
• The human brain controls memory, vision,
learning, thought, consciousness and other
activities. By means of electrochemical impulses
the brain directly controls conscious or voluntary
• The system consists of a cap that fits over the
user's head, with a few dozen holes through
which electrodes are attached so they rest on the
• The electrodes are connected via thin cables to
a"biosignal amplifier," which transmits the
signals from the brain to a computer.
• An electroencephalogram (EEG) measures the
brain's voltage fluctuations as detected from
scalp through electrodes.
Technique is very beneficial in field of severe disease,
brain & neural injuries.
Provides daily life support to physically disabled and
aged people, making use of bioengineering control
devices & robots to grant healthy life for elderly people.
Assists scientist to understand how the brain memory,
internal connection works can be understood to a great
Assists devices to help disabled people.
¤ Requires a high mental concentration
¤ Can pose a threat to mental stability of the subject
¤ May result in chronic strokes in severe cases
¤ There is a risk of severe mental infections such as
APPLICATIONS OF BMI
AND MANY OTHERS……
¤ A potential remedial tool.
¤ BMI is an advancing technology promising pattern shift in
areas like Machine Control, Human Enhancement, Virtual
¤ Several potential applications of BMI hold promise for
rehabilitation and improving performance, such as
treating emotional disorders (for example, depression or
anxiety), easing chronic pain, and overcoming movement
disabilities due to stroke.
¤ Intense R&D in future to attain intuitive efficiency.