BCI Brain Computer Interface – Brain Machine Interface
BCI Brain Computer Interface – Brain Machine Interface: Welcome to another post explaining BCI Brain-Computer Interface – Brain-Machine Interface back in the early days of computing. Data was input using punch cards or switches or reels of rapidly moving paper tape without put printed on a teletype device. Since that time we’ve developed increasingly fluid methods for human-computer interaction with keyboard, rodent’s monitors and touchscreens.
Now dominating our digital lives but what if we could link that computational wetware in our own heads directly with a computing device. Well in this video I’m going to discuss the development of BCI brain-computer interfaces intended to achieve. Just this oh and along the way, I’m also going to test out a consumer brain-computer interface that’s already on the market.
BCI Brain computer interfaces or BCI’s may currently be either input or output devices. Input BCI’s are comprised of sensors that acquire electrical BCI brain computer interface wave signals together with processing hardware that extracts distinct features and translates them into useful commands.
The other way around output BCI’s translate digital information into electrical signals but a fed into the users brain power electrode arrays or other stimulator Hardware. BCI brain computer interface may be constructed using one of two approaches. The first is non-invasive and may employ electroencephalography or EEG to acquire brain machine interface wave signals from sensors positioned on the outside of the skull.
Alternatively, non-invasive BCI’s my feed electrical signals into the brain machine interface using a TMS or transracial magnetic stimulation device. The second way to build a BCI is invasive and currently requires surgery to position sensors or stimulators inside the skull. To output, technologies have so far been a child with the first now electro cautery kagra fee or ACOG placing a strip or grid of electrodes on the surface of the brain machine interface.
Alternatively intra cortical microelectrodes can be implanted a few millimeters into the brain computer interface where they may serve as either sensors or stimulators.
Non Invasive Interfaces:
For obvious reasons today, most BCI research is non-invasive. This limits its scope and application but even so, some interesting results have been achieved. Perhaps most notably many researchers have used EEG to acquire so termed p300 brain computer interface waves which are then processed to allow a user to input letters or commands into a computer.
Such interfaces are painstakingly slow but without doubt, they can work. Researchers at the University of Washington have even used non-invasive BCI’s to send commands from one person’s brain to another over the Internet.
Specifically in a set of experiments in 2014 one test subject was an EEG skullcap while watching a monitor screen on which a computer game was being displayed but the fire button was in the hand of a second subject seated half a mile away in another building and who had a TMS coil placed over that brain machine interface. To shoot down Rockets the first user had to think about pressing the fire button.
When they did so brainwave signals were acquired by EEG processed and transmitted over the Internet in turn the TMS device induced an electrical pulse into the receiving subject’s brain machine interface. So causing them to experience visual stimuli and press the fire button.
Amazingly the split-second accuracy required to shoot down Rockets was achieved. In fact, across three pairs of test subjects success rate between 25 and 83% was obtained. In time University of Washington researchers hope to use BCI’s to transmit more complex ideas and thoughts from one brain machine interface to another. This could even allow for what they call BCI brain computer interface tutoring in which knowledge is transferred directly from the brain of a teacher to the BCI brain computer interface of a student.
The team at the University of Washington uses highly sophisticated sensors stimulators and processing hardware. However basic EEG BCI’s are now available for consumers including the Emotiv EPOC the inter exon muse ammonia Skype mind wave.
Such low-end hardware may actually record electromyographic signals from muscles addition to or even in place of electroencephalographic signals from the brain machine interface. However, in the interest of research, I thought that I should try one out.
The Nuro Sky Mind Wave
So here we have the newest guy mind wave – brain wave starter kit this is the most straightforward and the cheapest consumer BCR in the market. Right now so let’s have a look inside the box see what we get very exciting what’s in here and oh look it’s got a Quick Start guide I’m glad there’s a Quick Start Guide to a brain interface and then we have a black foam and Oh more black foam and the things are inside the black foam black on black on black and it’s a what was sort of soft touch plastic thing out and there we are there’s there the mind wave headset.
This is presumably a sort of thing oh yes it comes out look this I think ends up on your forehead so I think the best thing right now is for me to put this on and see how it works.
Mind Wave in The Display
So I’m now wearing the newest guy in mind wave headset and it has a single EEG sensor just above my left eyebrow. There was also a connection onto my earlobe which I presume gives him a relative potential I’m sure we’re not suggesting that versa any brain machine interface cells in my left ear lobe and the thing has a battery here. It’s a wireless device and it’s connected by Bluetooth to this app which is running on an Android tablet and what we have here is four displays.
And that the first one here is the really wacky one which is a brain wave visualization showing all the different frequency bands of my BCI brain computer interface wave at a real science fiction looking display area like data display and then we also have a bar chart this is showing you my brain wave power spectrum and the line you can see going across here he’s actually showing me at least a measure of the voltage value coming off the MIC.
My BCI brain computer interface that’s a bit strange to think that’s a measure of part of my brain wave signal but apparently it is and then down here at the bottom we have to gauge he’s one for attention this is a basically a measure of how much I’m focusing on a particular thing how much I’m holding my level of attention which is going up quite a bit.
There as I think about this and finally there’s a meditation gauge which is a measure of how calm am how relaxed my mind is and this consumer BCI brain computer interface like most of them are on the market basically allows you to control things in various apps as over 100 apps available for this device.
It allows you to control them by basically learns to control what we see on that attention gauge and what’s on the meditation gauge so let’s see if I can push the attention really high swaddle oh you’re out of real-time for seconds if I can push it up and up and up and up and there we already took a second but I’m nice to hit the top of attention now let’s see if I can raise the meditation one right way up to the top so again I’ll drop out of real-time and there we are I’ve managed to a top out in the meditation gauge as well and I’m sure if I spend a bit more time at this I could get better at controlling these two gauges and using to control very simple apps.
This said this kind of EEG consumer brain interface is not going to change the world he’s not going to really change how we interface with computers.