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Brain Computer Interfaces
By
You can make it with BCI !
Introduction
• Brain-computer interface (BCI) is a fast-growing emergent technology, in
which researchers aim to build a d...
BCI Model
Model
Early work
• Algorithms to reconstruct movements from motor cortex neurons, which
control movement, were developed in 1970...
How does it work?
• Signal Acquisition
• Signal Processing
• Devices
Brain Wave Control
Brain Wave Control
• Active
– α (8 – 12 Hz): relaxed/reflecting
– β (12 – 30 Hz): alert/working
- Training
- Misjudgment
Brain Wave Control
• Passive
– Evoked potentials
Data Acquisition
• Invasive BCIs
• Non-Invasive BCIs
• Partially-Invasive BCIs
• Wireless BCIs
Invasive BCIs
• Implanted: grey matter
• Signals: highest quality
• Scar-tissue build-up
• Target:
– repairing damaged sig...
Electrode Arrays
App.- Artificial Vision
4X4
16 pixels
8X8
64 pixels
12X12
144 pixels
16X16
256 pixels
32X32
1024 pixels
128X128
16384
pixe...
Non-Invasive BCIs
• poor signal resolution
• power muscle implants and restore partial
movement
• Interfaces
– EEG
– MEG
–...
MEG
• Magnetoencephalography
• Magnetic Field: 10-15T ~10-13T (Weak!!)
– S.Q.U.I.D. Sensors
– Shielded Room
Magnetic Field
Partially-Invasive BCIs
• Implanted: skull
• lower risk of forming scar-tissue in the brain
• Signal quality between invas...
Wireless BCIs
• More practical
• Embedding multiple chips
– More complicated thoughts
• Transmission with RF
• key require...
Wireless BCIs
 Size: 2cm in diameter、8cm thick
 Low cost
 Receive Distance: 10m ~ 50m
Examples of BCI
Rats implanted with BCIs in Theodore
Berger’s experiments
Monkey operating a robotic arm with
BCIs
Controlling a robotic dog with BCI
A man operates the computer with his EEG
P300->300ms
頂葉
Applications
• Control robots that function in dangerous or inhospitable
situations (e.g., underwater or in extreme heat o...
Honda Asimo
Control
Gaming Control
Eyes can say a
lot…
Bionic Eye
And an artificial eye can see a
lot…
Advantages of BCI:
Eventually, this technology could:allow paralyzed people to control prosthetic
limbs with their mind
tr...
Disadvantages
• Headache
• Exhausting
• Laziness Degenerate
Future
• Integrate with different territory
• From lab to factory
• Nursing and medical treatment
Fiction or Future??
Conclusion
• A potential therapeutic tool.
• BCI is an advancing technology promising paradigm shift in
areas like Machine...
Thank You!
Brain computer interfaces
Brain computer interfaces
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Brain computer interfaces

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Brain computer interfaces

  1. 1. Brain Computer Interfaces By
  2. 2. You can make it with BCI !
  3. 3. Introduction • Brain-computer interface (BCI) is a fast-growing emergent technology, in which researchers aim to build a direct channel between the human brain and the computer. • A Brain Computer Interface (BCI) is a collaboration in which a brain accepts and controls a mechanical device as a natural part of its representation of the body. • Computer-brain interfaces are designed to restore sensory function, transmit sensory information to the brain, or stimulate the brain through artificially generated electrical signals. Introduction
  4. 4. BCI Model
  5. 5. Model
  6. 6. Early work • Algorithms to reconstruct movements from motor cortex neurons, which control movement, were developed in 1970s. • The first Intra-Cortical Brain-Computer Interface was built by implanting electrodes into monkeys. • After conducting initial studies in rats during the 1990s, researchers developed Brain Computer Interfaces that decoded brain activity in monkeys and used the devices to reproduce movements in monkeys and used the devices to reproduce monkey movements in robotic arms.
  7. 7. How does it work? • Signal Acquisition • Signal Processing • Devices
  8. 8. Brain Wave Control
  9. 9. Brain Wave Control • Active – α (8 – 12 Hz): relaxed/reflecting – β (12 – 30 Hz): alert/working - Training - Misjudgment
  10. 10. Brain Wave Control • Passive – Evoked potentials
  11. 11. Data Acquisition • Invasive BCIs • Non-Invasive BCIs • Partially-Invasive BCIs • Wireless BCIs
  12. 12. Invasive BCIs • Implanted: grey matter • Signals: highest quality • Scar-tissue build-up • Target: – repairing damaged sight – providing new functionality to persons with paralysis • Artificial Vision System
  13. 13. Electrode Arrays
  14. 14. App.- Artificial Vision 4X4 16 pixels 8X8 64 pixels 12X12 144 pixels 16X16 256 pixels 32X32 1024 pixels 128X128 16384 pixels
  15. 15. Non-Invasive BCIs • poor signal resolution • power muscle implants and restore partial movement • Interfaces – EEG – MEG – MRI
  16. 16. MEG • Magnetoencephalography • Magnetic Field: 10-15T ~10-13T (Weak!!) – S.Q.U.I.D. Sensors – Shielded Room
  17. 17. Magnetic Field
  18. 18. Partially-Invasive BCIs • Implanted: skull • lower risk of forming scar-tissue in the brain • Signal quality between invasive BCIs & non- invasive BCIs
  19. 19. Wireless BCIs • More practical • Embedding multiple chips – More complicated thoughts • Transmission with RF • key requirement: keep the heat down
  20. 20. Wireless BCIs  Size: 2cm in diameter、8cm thick  Low cost  Receive Distance: 10m ~ 50m
  21. 21. Examples of BCI
  22. 22. Rats implanted with BCIs in Theodore Berger’s experiments
  23. 23. Monkey operating a robotic arm with BCIs
  24. 24. Controlling a robotic dog with BCI
  25. 25. A man operates the computer with his EEG
  26. 26. P300->300ms 頂葉
  27. 27. Applications • Control robots that function in dangerous or inhospitable situations (e.g., underwater or in extreme heat or cold). • Create a feedback loop to enhance the benefits of certain therapeutic methods. • Develop passive devices for monitoring function, such as monitoring long-term drug effects, evaluating psychological state, etc. • Monitor stages of sleep
  28. 28. Honda Asimo Control
  29. 29. Gaming Control
  30. 30. Eyes can say a lot…
  31. 31. Bionic Eye And an artificial eye can see a lot…
  32. 32. Advantages of BCI: Eventually, this technology could:allow paralyzed people to control prosthetic limbs with their mind transmit visual images to the mind of a blind person, allowing them to see transmit auditory data to the mind of a def person, allowing them to hear allow gamers to control video games with their minds allow a mute person to have their thoughts displayed and spoken by a computer Disadvantages of BCI: Research is still in beginning stages The current technology is crude Ethical issues may prevent its development Electrodes outside of the skull can detect very few electric signals from the brain Electrodes placed inside the skull create scar tissue in the brain
  33. 33. Disadvantages • Headache • Exhausting • Laziness Degenerate
  34. 34. Future • Integrate with different territory • From lab to factory • Nursing and medical treatment
  35. 35. Fiction or Future??
  36. 36. Conclusion • A potential therapeutic tool. • BCI is an advancing technology promising paradigm shift in areas like Machine Control, Human Enhancement, Virtual reality and etc. So, it’s potentially high impact technology. • Several potential applications of BCI 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. • Will enable us to achieve singularity very soon. • Intense R&D in future to attain intuitive efficiency.
  37. 37. Thank You!

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