What if there was a device which allowed amputees to feel their limbs again?

The loss of a limb or damage of the nerves that travel through our bodies can greatly diminish the human experience. The sensory system dictates how we respond to our environment, transmitting signals to and from our brains so we can move and feel. Pain, pressure, and temperature response are just some of the functions of the somatosensory system connected to our skin, allowing us to experience the world. In addition, our nerves have a motor component, sending signals from the brain to our muscles, telling them to work so we can move and perform tasks.

Nerves function much like electrical wires, transmitting signals between the brain and areas of stimulus, like an electrical wire between a socket and device. It is this electrical current which causes signals to be transmitted. After an amputation, the nerve is severed, not only disrupting the flow of a nerve signal, but also sometimes leaving amputees with a cruel phantom limb pain, as if the limb was still there. For those with limbs still intact who suffer from nerve damage, the physical limb remains, but its function is diminished without the motor and sensory signals being transmitted.

SENSY by Sensars is almost unbelievable in the amazing feat that it has sought to achieve, allowing amputees and those with nerve damage to feel again. Artificial sensors are implanted to connect to intact nerves, stimulating response in the brain as if there was an intact nerve in a limb. The sensors are connect to wires simulating an actual nerve, and those wires are implanted and connected to actual nerves within the body. Between the artificial sensors  and the residual nerve is an implantable neurostimulator which is bidirectional, sending and receiving signals from both the intact nerve and the artificial sensors.

The versatility of SENSY is also amazing. The company has a multi-functional product which targets both amputees and those with intact limbs who have nerve damage. There are 3 options, but the flow of information is essentially the same. A sensor (either from artificial skin, glove/sock, or “pacemaker”) sends a signal to a controller which is able to activate that signal to an implantable neurostimulator, which causes an electrical signal to communicate with the intact nerve. Once that communication is made, the connection is made between the artificial and biological part of the nervous system, and feeling is processed in the brain.

For amputees, Sensar has sought to decrease phantom limb pain and increase sensory feedback through sensors with a neuroprosthetic device which includes artificial skin. As we know, skin is very sensitive, and in this case will contain sensors which will prompt the prosthetic device to send signal through the artificial nervous system.

For those with intact limbs. the company is designing socks and gloves for those with upper and lower limb nerve damage. These socks and gloves contain sensors within the fabric which act essentially as sensitized skin, also sending signals to an implanted device which communicates with the intact nerves.

Finally, for those with an amputation but without prosthesis, the company has created an implantable pacemaker, essentially an excitable device like a sensor which also sends a signal to the nerve.

Go to the website to read about the full and brilliant description of this product, and watch the video for a visualization of how the artificial sensors are able to communicate with an intact nerve.Still in the prototype phase and not yet available for sale, SENSY will truly impact people’s lives once it is on the market.