When most people talk about neurolink technology, they do so for the most part in purely theoretical terms. Neurolink technology refers to types of technology and machines that are capable of interfacing directly between the human brain and the hardware of the technology. By and large, this technology today remains primarily in the realm of science fiction. While there have been significant advances made in the field over the last few decades, neurobiology is still one of the least developed areas of scientific study today. The more we have learned as a species about the structure and function of our brains, the more we have realized that the vast majority of the purpose and function of the human brain has yet to be fully understood.
The largest obstacle in the development of Neurolink devices has been in the development of the technology itself however. While there is still a significant amount we have yet to uncover about how the human brain works, there is in fact a large amount that we do understand. There are a number of different neurological disorders, conditions, and injuries that are fully understood, all the way from cause to effect, yet treatments for those problems do not yet exist. While some of that is also due to a lack of biological understanding, the largest obstacle to Neurolink technology is the development of the hardware itself. It is challenging to design electronic devices that can be implanted directly onto a human brain without causing devastating side effects.
While the first examples of noninvasive brain to computer interface devices date back as far back as the early 1920s, the development of brain to computer interface implants is a much more recent development in human history. The most famous example of a functioning Neurolink device that is being used today is called a cochlear implant, a piece of technology that allows the deaf and hearing impaired to hear sounds by sending signals directly to the brain. There are several other examples of this type of Neurolink implant being used to treat brain conditions, such as implants given to those who suffer from severe arthritis or essential tremors in order to allow them to use their hands without them shaking uncontrollably. However, these devices are not completely one hundred percent effective as of yet.
While there may not currently be a plethora of Neurolink devices being used in 2019, there is no doubt in the minds of any futurist that the future of technology will present itself in the form of direct brain to machine interface devices. It has been theorized that all computers and cell phones will one day be made obsolete, and some day soon, instead we will all have a Neurolink implant to access the internet and communicate instead.