Tag Archives: cyborg

Optogenetics: the key to our cyborg future?

neuronsThere’s a lengthy but interesting piece up over at Wired about the relatively young discipline of optogenetics – the science of isolating and communicating with specific types of neuron using light. The discovery of the process is an interesting story in its own right, but the really futurismic bit is the implication tucked into the final few paragraphs:

Optogenetics has amazing potential, not just for sending information into the brain but also for extracting it. And it turns out that Tsien’s Nobel-winning work — the research he took up when he abandoned the hunt for channelrhodopsin — is the key to doing this. By injecting mice neurons with yet another gene, one that makes cells glow green when they fire, researchers are monitoring neural activity through the same fiber-optic cable that delivers the light. The cable becomes a lens. It makes it possible to “write” to an area of the brain and “read” from it at the same time: two-way traffic.

Why is two-way traffic a big deal? Existing neural technologies are strictly one-way. Motor implants let paralyzed people operate computers and physical objects but are incapable of giving feedback to the brain. They are output-only devices. Conversely, cochlear implants for the deaf are input-only. They send data to the auditory nerve but have no way of picking up the brain’s response to the ear to modulate sound.

No matter how good they get, one-way prostheses can’t close the loop. In theory, two-way optogenetic traffic could lead to human-machine fusions in which the brain truly interacts with the machine, rather than only giving or only accepting orders. It could be used, for instance, to let the brain send movement commands to a prosthetic arm; in return, the arm’s sensors would gather information and send it back.

Science fiction has been talking about the brain-machine interface for decades, but usually in terms of splicing the hardware into the nervous sytem in much the same way as connecting up a regular electronic circuit, and with little experimental evidence for its viability. As Chorost points out in the Wired piece, we’re not going to see commercially available optogenetic interfaces for some time yet, but this proof-of-concept work suggests it really is only a matter of time before we do. [image by LoreleiRanveig]

Prosthetics porn

Hans Husklepp - Immaculate Arm prosthetic design conceptThere is an arc of progress with human technologies: first comes functionality, then gradual acceptance, and then the aesthetic overhaul. The transition from practicality to personality has always interested me, because it hinges on that point of acceptance, be it grudging or enthusiastic; only then do notions of art start to appear and entwine themselves with functional objects.

Some objects achieve that point of acceptance more quickly than others; these are usually the objects of power, objects that make someone more than human – swords and cars, for example. Slower to achieve acceptance and freedom from stigma are those objects designed to raise the disadvantaged to the same status as everyone else.

We appear to be on that cusp of acceptance with human prosthetics. Granted, there have probably been carved crutches, peg-legs and walking sticks for millennia, but they were only ever crude stand-ins (if you’ll excuse the pun) for a damaged or missing limb. But they represented a refusal to be stigmatised, a defiant embracing of the user’s condition – “This is me; this is my replacement limb. Deal with it.”

Now we can build prosthetic legs that are in some respects superior to the originals, and it surely won’t be long before artificial arms that can replicate (or exceed) the essential functions of their biological equivalents become available to the widening sphere of those who can afford them – and that defiance, that rejection of stigma, will become more prevalent. It’s a stage of great interest to transhumanist thinkers, naturally, but it’s also attracting the eyes of artists and designers who’ve noticed a new human space to colonise with the communication of ideas.

There’s a gallery of cybernetic design concepts – like Hans Huseklepp’s Immaculate Arm, pictured top right – and photo-portraiture over at New Scientist at the moment which will get you thinking about this sort of stuff (it’s what inspired the preceding paragraphs of waffle from me, at any rate), but consider it only a starting point. Sit back for five minutes and think about the ways we already customise the human body for aesthetic effect; then imagine what we’ll start doing when prosthetics are affordable and effective enough to become ubiquitous. It’s closer than you think. [image copyright Hans Huseklepp, reproduced here under Fair Use terms; please contact for take-down if required]

Here’s your starter for ten: when will we first hear of people choosing to replace undamaged natural limbs with prosthetics, be it for practical or artistic reasons? How will the general public react to that? How would you feel if your teenaged son came home with a cybernetic hand in place of the perfectly functional one he had before?

Get your Ripley on with the Power Loader exoskeleton

Remember me comparing the HAL exoskeleton to the cargo-loader from Aliens? Yeah, well, so this is me eating my words – this thing is the real deal. Ladies and gentlemen, the ActiveLink Power Loader exoskeleton suit:

The so-called “Power Loader” suit — which takes its name from the fictional hydraulic exoskeleton suit appearing in the sci-fi classic “Aliens” (1986) — is built on an aluminum-alloy frame and weighs 230 kilograms (500 lbs). Described as a “dual-arm power amplification robot,” the exoskeleton suit is currently equipped with 18 electromagnetic motors that enable the wearer to lift 100 kilograms (220 lbs) with little effort. In addition, the Power Loader’s simple, intuitive control system employs direct force feedback, allowing the operator to directly feel the movement of the robot while controlling it.

There’ll be a version on the market by 2015, apparently, so start saving your pennies.

My heart no longer beats

HeartMateIIPhysicians have successfully implanted an artificial heart that does not beat:

Salina Mohamed So’ot has no pulse. But she is very much alive.

The 30-year-old administrative assistant is the first recipient here to get a new artificial heart that pumps blood continuously, the reason why there are no beats on her wrist.

An interesting development. I wonder if the efficiency and reliability of such artificial hearts will ever be such that people elect to replace their existing hearts with them even before their biological hearts wear out?

[via Slashdot, from The Straits Times][image from on Technology Review]

Geordi’s video-to-brain visor being built at MIT

Geordi LaForge stencil graffittiOK, so it’s going to be some time yet before Geordi LaForge video visors are high-street gadgets, but the underlying technologies are coming to fruition faster than I’d have ever expected. Via grinding.be we discover that a team at MIT have sussed a method for grafting a digital device to the optic nerve, enabling them to pipe electronically generated images direct the brain:

The implanted chip, according to the MIT team behind it, features a “microfabricated polyimide stimulating electrode array with sputtered iridium oxide electrodes” which is implanted into the user’s retina by a specially-developed surgical technique. There are also “secondary power and data receiving coils”.

Once the implant is in place, wireless transmissions are made from outside the head. These induce currents in the receiving coils of the nerve chip, meaning that it needs no battery or other power supply. The electrode array stimulates the nerves feeding the optic nerve, so generating a image in the brain.

The wireless signals, for use in humans, would be generated by a glasses-style headset equipped with cameras or other suitable sensors and transmitters tuned to the coils implanted in the head.

For now, however, the system has only been tried out in Yucatan minipigs. Three of the diminutive Mexican porkers have had the Star Trek/Gibsonesque implants for seven months, but as yet it’s difficult to tell just how well they work – as the pigs aren’t talking. The MIT boffins have fitted them with instrumented-up contact lenses to try to get an idea of what effects the implants have.

If you really need me to prompt you towards imagining the awesome and/or weird stuff that might happen as a result of this technology becoming readily available, I suspect you’re reading the wrong website. 🙂 [image by striatic]