Brain computer interfaces: TKS Student Sessions
Introduction to Brain Computer Interfaces
In this section, Kelly and Satya introduce themselves and the topic of brain computer interfaces (BCIs). They also provide some information about the structure of the session.
What are BCIs?
- BCIs connect a computer to your brain.
- Example: A student at TKS created a remote control car that she controlled with her brain using temporal sensors on her head.
- NASA has developed a new type of BCI that tracks blood flow in an astronaut's brain as they control a spaceship. This helps with safety measures by allowing people reading the data to tap into spidey senses and address any issues.
Applications of BCIs
- BCIs can be used for digging formations into your brain.
- Example: A research team implanted a BCI into a monkey's brain and spine to help it walk again after a spinal cord injury.
- Another example is using BCIs for prosthetics, such as controlling robotic arms or legs.
How Do BCIs Work?
In this section, Kelly and Satya explain how BCIs work and the different types of signals they use.
Types of Signals
- EEG (electroencephalography): Measures electrical activity in the brain through electrodes placed on the scalp.
- ECoG (electrocorticography): Measures electrical activity in the brain through electrodes placed directly on the surface of the cortex.
- fMRI (functional magnetic resonance imaging): Measures changes in blood flow in the brain to determine which areas are active.
How BCIs Work
- BCIs use these signals to interpret what the user wants to do, such as moving a cursor or controlling a prosthetic limb.
- The BCI then sends that information to the computer, which carries out the desired action.
Advancements in BCIs
In this section, Kelly and Satya discuss recent advancements in BCIs and their potential impact on society.
Recent Advancements
- Elon Musk's Neuralink is working on developing implantable BCIs that can communicate wirelessly with devices.
- Researchers at UCSF have developed a BCI that can decode speech from brain activity.
- Facebook is working on a non-invasive BCI that can translate thoughts into text.
Potential Impact
- BCIs have the potential to revolutionize healthcare by allowing people with disabilities to control prosthetics or communicate more easily.
- They could also be used for entertainment purposes, such as controlling video games with your mind. However, there are ethical concerns around this use case.
Brain-Computer Interfaces
The speaker discusses the primary way that brain-computer interfaces (BCIs) are used, which is to take data produced by the brain in the form of electrical impulses and send it to a computer. BCIs have medical applications, such as controlling prosthetic limbs for people who have lost the ability to walk.
Applications of BCIs
- BCIs can be used to control prosthetic limbs in people and animals.
- BCIs can be used to allow people who have lost the ability to walk or lost limbs, such as military veterans, to control their prosthetics using their brains.
- In the future, BCIs could be used to talk to cars and other devices.
Brain-to-Brain Interfaces
- Scientists have conducted studies where participants in different research facilities were able to communicate with each other using brain-to-brain interfaces.
- Participants were able to accurately report what was happening with a 3D cube just through data harvested from someone's brain.
- The next step for BCI technology is computer-to-brain interfaces, which would involve downloading information directly into our brains.
How BCIs Work
- Electrical impulses produced by the brain are sent to a computer via a BCI.
- When something happens in your brain, it produces an action potential that has two halves - electrical and chemical.
Brain Waves and Their Importance
In this section, the speaker discusses the different types of brain waves and their importance in controlling brain-computer interfaces.
Types of Brain Waves
- Gamma waves (40 Hertz) are associated with cognitive processes.
- Beta waves are associated with alertness and working thoughts.
- Alpha waves are associated with relaxation and meditation.
- Theta waves are associated with drowsiness.
- Delta waves are associated with deep sleep.
Controlling Brain-Computer Interfaces
- To control a brain-computer interface, trigger points need to be created for specific types of thoughts.
- EEGs can be used to measure electrical impulses in real-time to determine what type of thought work is being done.
- EKGs can also be used as a simple way to measure electrical impulses.
EEG vs EKG
In this section, the speaker explains the difference between EEG and EKG measurements.
EEG Measurements
- EEG measures electrical impulses in real-time, providing temporal data on what type of thought work is being done.
- Spatial data is not available through EEG measurements.
EKG Measurements
- EKG measures electrical impulses from the heart, providing information about heart function.
- It is a simple way to measure electrical impulses but does not provide information about thought work.
How to Measure Brain Waves
In this section, the speaker discusses different ways to measure brain waves.
Methods for Measuring Brain Waves
- There are many methods for measuring brain waves including Muse headbands that can be purchased on Amazon.
- The Muse headband was used by Sasha for her project training her own brain.
Brain Computer Interfaces
In this section, the speaker discusses different types of brain computer interfaces (BCIs) and their applications.
Types of BCIs
- There are three main types of BCIs: EEG, ECoG/LFP, and fMRI/MEG.
- EEG sensors are non-invasive and placed on the forehead to collect brainwave information.
- ECoG/LFP sensors are invasive and placed underneath the skull or implanted into the brain to collect more complex brainwave information.
- fMRI uses magnetic fields to create imaging information of the magnetic field in the brain. It provides spatial data but not temporal data.
- MEG combines temporal and spatial data by measuring magnetic fields generated by currents in the brain outside of the head.
Limitations
- The current generation of technology has limitations such as low signal strength, requiring stillness during scanning, and not being suitable for children.
Applications
- BCIs have medical applications such as diagnosing medical conditions like epilepsy or seizures. They can also be used to shut down electrical impulses that may trigger seizures in patients.
Brain-Computer Interfaces
In this section, the speaker discusses brain-computer interfaces (BCIs), including different types of BCIs and how they are used in conjunction with other technologies.
Types of BCIs
- BCIs can range from simple EEG sensors to surgical implants with tiny electrodes.
- Examples of BCIs include using them to bypass spinal cord injuries or control limbs.
- Combining BCIs with other technologies such as Kinect omics and artificial intelligence augmentation reality can supercharge their capabilities.
Training the Brain
- The speaker shares her experience training her brain using a neurofeedback headband for 20-30 minutes a day for a week.
- She found it challenging at first but eventually saw changes in her brain activity, leading to increased calmness and mindfulness.
- The speaker notes that BCIs have many potential uses beyond just training the brain.
Neuralink
- Neuralink is an Elon Musk-owned company focused on researching nanotechnology-based brain-computer interfaces called neural dust.
Neuralink and Brain-Computer Interfaces
In this section, the speaker discusses the Neuralink project and its potential applications.
Neuralink Project
- The Neuralink project is an exciting company that aims to further research on brain-computer interfaces.
- The implications of building a functioning neural ace are huge, as it would allow users to connect their brains to everything in their lives through a cellphone application.
- Brain-computer interfaces intersect with other technologies such as nanotechnology, which could lead to some interesting developments.
- Brain-computer interfaces can be used for lie detection by recognizing different electrical impulses that are activated when someone is not being truthful.
Security Concerns
- While brain-computer interfaces do open up the possibility of hacking, there is currently no real-time live stream or control over the brain. The most that could happen right now is access to data in the form of Hertz or brainwave patterns.
- Watching for security breaches can help ensure the safety of both the computer and user.
Resources for Brain-Computer Interfaces
- Open BCI is a great resource for finding projects related to different types of BCIs, including music-related projects and controlling prosthetics or cars with your brain.
- Towards Data Science is another good resource for reading articles about BCIs and neuroscience in general.
- The Human Connectome Project looks at connections between neurons in the brain and has correlations with BCIs.
Overall, this section provides an overview of the Neuralink project and its potential applications. It also touches on security concerns related to BCIs and provides resources for those interested in learning more about the field.
Brain-Computer Interfaces and Neuroscience
The speaker discusses the complexity of extracting data from EEGs and the potential for brain-computer interfaces to revolutionize neuroscience.
Brain-Computer Interfaces
- Brain-computer interfaces are on the cusp of revolutionizing neuroscience.
- There is still a long way to go in terms of improving brain imaging techniques, but this is an exciting time to get involved in brain-computer interfaces.
- The speaker provides their email for anyone who has further questions about brain-computer interfaces.
Neuroscience
- Neuroscience is a relatively new field compared to other sciences, and we are just starting to make breakthroughs.
- FMRI technology is still new, with only two FDA-approved uses in clinical settings.
- The speaker mentions that there will be a follow-up email after the session with basic resources on connectomics.
Applications of Brain-Computer Interfaces
- Brain-computer interfaces are not just about studying brain data but also how we can use that data to interface with other technologies like prosthetic limbs or computers.
- By extending human capacity through exporting brain data, we can expand human capabilities in a cyborg-esque way.
Overall, this talk highlights the potential for brain-computer interfaces to revolutionize neuroscience by providing insights into what our brains tell us. While there is still much work to be done in terms of improving imaging techniques, this is an exciting time for those interested in getting involved in this field.
Brain-Computer Interfaces and Medical Applications
In this section, the speaker discusses how brain-computer interfaces can be used in a medical context to prevent seizures. They also talk about the limitations of brain-computer interfaces in terms of memory and mental illness.
Medical Applications of Brain-Computer Interfaces
- Using brain data to tell a device to shut down and prevent seizures.
- Potential applications for neuromuscular diseases such as stroke and spinal cord injury.
- Shutting down misfiring action potential and electrical impulses.
Limitations of Brain-Computer Interfaces
- Memory is not stored in a central location in the brain, making it difficult to treat conditions like Alzheimer's and dementia.
- Limited capacity to assist with mental illness due to the primarily chemical nature of these conditions.
Learning About Neuroscience and Brain Computer Interfaces
In this section, the speaker talks about their background in educational psychology and their passion for neuroscience. They also discuss the excitement surrounding brain-computer interfaces due to their newness and potential applications.
Passion for Neuroscience
- Background in educational psychology.
- Passion for learning about how the brain works.
Excitement Surrounding Brain Computer Interfaces
- Potential for supercharging the brain by connecting it to computers and other devices.
- Optimistic view that brain computer interfaces could lead to enhanced abilities or "superpowers."
Painless Superpowers and Living to 200
In this section, the speaker talks about a cool topic related to painless superpowers that one can get from DCIS and using them to live up to 200 years. The speaker encourages the audience to check out human longevity for more information.
Painless Superpowers and Living to 200
- The speaker introduces a cool topic related to painless superpowers that one can get from DCIS.
- These superpowers can be used to live up to 200 years.
- The audience is encouraged to check out human longevity for more information.
- A follow-up email will be sent with more details on the topic.
Conclusion of BCI Session
In this section, the speaker concludes the BCI session for the day.
Conclusion of BCI Session
- The speaker concludes the BCI session for the day.
- The audience is reminded about Saw Tuned's email address being posted in the chat if they have any questions.