10-02-2012, 01:42 PM
BRAIN COMPUTER INTERFACE
[attachment=17413]
Neuron Structure:
Our brain is made of approximately 100 billion nerve cells, called neurons.
Neurons have the amazing ability to gather and transmit electrochemical signals.
Neurons have three basic parts:
How does BCI work
The reason a BCI works at all is because of the way our brains function.
Our brains are filled with neurons connected to one another by dendrites and axons.
Every time we think, move, feel or remember something, our neurons are at work. That work is carried out by small electric signals that zip from neuron to neuron as fast as 250 mph.
The signals are generated by differences in electric potential carried by ions on the membrane of each neuron.
Scientists can detect those signals, interpret what they mean and use them to direct a device of some kind.
Invasive
To get a higher-resolution signal, scientists can implant electrodes directly into the gray matter of the brain itself, or on the surface of the brain, beneath the skull.
This allows for much more direct reception of electric signals and allows electrode placement in the specific area of the brain where the appropriate signals are generated.
The electrodes measure minute differences in the voltage between neurons. The signal is then amplified and filtered.
It is then interpreted by a computer program,
[attachment=17413]
Neuron Structure:
Our brain is made of approximately 100 billion nerve cells, called neurons.
Neurons have the amazing ability to gather and transmit electrochemical signals.
Neurons have three basic parts:
How does BCI work
The reason a BCI works at all is because of the way our brains function.
Our brains are filled with neurons connected to one another by dendrites and axons.
Every time we think, move, feel or remember something, our neurons are at work. That work is carried out by small electric signals that zip from neuron to neuron as fast as 250 mph.
The signals are generated by differences in electric potential carried by ions on the membrane of each neuron.
Scientists can detect those signals, interpret what they mean and use them to direct a device of some kind.
Invasive
To get a higher-resolution signal, scientists can implant electrodes directly into the gray matter of the brain itself, or on the surface of the brain, beneath the skull.
This allows for much more direct reception of electric signals and allows electrode placement in the specific area of the brain where the appropriate signals are generated.
The electrodes measure minute differences in the voltage between neurons. The signal is then amplified and filtered.
It is then interpreted by a computer program,
