When we think of a Brain-Computer Interface, the best example I can give is Mark 42 from Iron Man 3. It was a suit built to respond to Tony Stark’s thoughts. We all know how cool that was, right? What if I told you that the technological principle for this kind of tech already exists? With that in mind, let’s take a look at how a brain-computer interface works.
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Brain-Computer Interface Types
A brain-computer interface acquires signals from the brain, analyzes them and translates them into commands. These commands are then translated into a signal from peripheral devices to provide the desired output. The primary goal of a BCI is to restore useful function for people who have developed neuromuscular disorders, such as amyotrophic lateral sclerosis, cerebral palsy, stroke, or spinal cord injury. There are two kinds of Brain-Computer Interface: Non-Invasive Brain-Computer Interface and Invasive Brain-Computer Interface.
(Image Credit: iron man 3 Movie)
Non-Invasive Brain-Computer Interface
As the name suggests, a non-invasive brain-computer interface is one that can work without intrusive procedures into the brain. A non-Intrusive Brain-Computer Interface mostly works on the principles of EEG (Electroencephalography).
A man connected to the electrodes of an EEG (Photo Credit: Thuglas/Wikimedia Commons)
Most Non-Invasive BCI uses the concept of EEG in their models. The most famous among them is Neurosky, a consumer-friendly product that uses the concept of EEG. It has various modes where one can test one’s level of attention, mental effort, and meditation level. It consists of one EEG sensor that touches the front left upper part of the skull, just above the left eyebrow. The applications are only limited by the user’s own ability to use the product.
Neurosky (Image Credit: Flickr)
The advantages of a non-invasive brain-computer interface stem from the fact that it is much cheaper to work with and heavy research focus is always given to non-invasive BCI. Also, multiple people from diverse backgrounds can work on non-invasive BCI, whereas in the case of an invasive BCI, a medical professional is always needed.
Invasive Brain-Computer Interface
An invasive brain-computer interface involves the surgical implantation of a device into the skull of the user. There are two kinds of Invasive BCI that have been tried and tested thus far.
(Photo Credit: BruceBlaus./Wikimedia Commons)
Cochlear Implant
Finally, we have the Intracortical Microelectrodes, also known as chronic electrode implants. A chronic electrode implant is an electronic device that is usually implanted into the brain or issue for an extended period. It has two significant applications, one for stimulating and the other for recording. Applications for stimulating involve sensory prosthetics, such as cochlear implants. A cochlear implant is a device that provides the sensation of sound to a person with severe or profound sensorineural hearing loss.
Brain-Computer Interface is a cutting edge and relatively new topic. Ongoing research by prestigious universities and major corporations will undoubtedly take this technology to a whole new level in the near future!
