As a disabled person whose body is basically falling apart (details too gross to go into), I've been wondering for a long time when I can get my cyborg transformation underway. What's the status of materials that are compatible with being implanted in the body?

The use of the term "cybernetic" hints at where the difficulty lies - traditionally, cybernetics is the study of the interactions within complex systems with an emphasis on feedback and control. The body is a terrifically complex system, which can be maddening to meddle with - surprisingly forgiving in some respects, infuriatingly recalcitrant in others.

Full disclosure - I'm a cyborg. I wear corrective lenses and shoes that modify my feet appropriately for an urban environment. It's not exactly Robocop, true, but according to the loosest definition, most of us already have a complicated relationship with technology blurring the line between "me" and "stuff." It's not a relationship that's going to get simpler. The relatively simple implants and prosthetics of today will soon give way to devices that interface more completely and naturally with the body. We have a number of biocompatible materials available to us already, from titanium to various polymers. They aren't perfect by any means, but the body can be surprisingly accommodating.

Sometimes you can avoid implantation altogether with an exoskeletal assist. A weakened body can recover some of its strength via an exoskeleton that senses an intended motion of the wearer and reinforces it.

Stark Enterprises and Apple present: the Iron Man.

For organs no longer present, there are robotic limbs that obey commands given by the mind. The bionic limb below senses commands from the wearer and (with a lot of practice) obeys. Obviously the connection between nerve and the robot limb is unusual, but the brain is pretty good at making unfamiliar signals familiar with use.

"They tell you to try and think as if you have two hands."

Even entire arms can be replaced, by rerouting the motor nerves that control the arm to the chest where they can be read by the robotic arm's shoulder mount.

A not-so-phantom limb.

Having a cybernetic limb sounds great until you consider how much you depend upon your sense of touch. Walking with a leg that's asleep is no mean feat, and have you ever tried to eat a meal fresh from the dentist before the novocane wears off? Sure, your shiny robot hand is sturdy, but the wineglass you want to pick up with it isn't - and just because the hand won't be damaged by that hot stove doesn't mean the flesh attached to your extremely conductive prosthesis won't be. The first thing they did after fitting Luke Skywalker with a replacement was test to see that he could feel with it.

"I will become a jedi, bite off more than I can chew, and get my hand lopped off...like my father before me."

When the sensory nerves connecting the brain to the missing limb are also rerouted to the chest, a touch on the patient's chest can feel like someone's brushing against fingers that are no longer there, or stretching skin that no longer exists. While the recovered sensations are currently somewhat random, further research into the phenomena along with a robot arm including sensors that feed back to the sensory nerves in the chest could give us cybernetic replacements capable of being tickled.

Astounding as these interfaces are, the devices themselves are still wearable - that is to say, removable. We won't neglect the truly implantable devices. For example, Matt Nagel, though quadriplegic, can use the 96 electrodes implanted into his motor cortex to move a cursor on a computer screen or command a robot arm by thought alone.

Matt Nagel wills his computer into action.

The senses have not been neglected, either. Though the resolution of existing bionic eye implants is as of yet only in the tens of pixels, these devices allow the wearers enough vision to dramatically improve their quality of life. No word yet on whether they'll come in mirrorshades.

A bionic retinal implant.

Finally, there is the cochlear implant, used regularly by over 100,000 people worldwide to directly stimulate the auditory nerves of the deaf or extremely hard of hearing. These have been around since the late '70s, but only recently has the technology become advanced and popular enough to encourage users to hack their own implants.

You'll know that the human-machine interface has truly arrived when the first thing you do post-implantation is replace the standard firmware with an open-source alternative.

Terry Johnson is a biology researcher at UC Berkeley and io9's resident biogeek. If you have a question you'd like Terry to answer, email him at: tdj@io9.com.

Festo's Bionic Arm [The Future of Things]

Part of the challenge, says Eick, was "we only had the rights to the show's title and the character's name, but, legally, we couldn't depict mechanistic technology that involved parts being placed on the body."

I'm guessing this is the same legal circle jerk (involving the novel which the 1970s show was based on) which prevents a DVD release of the Lindsay Wagner series. In other words, Bionic Woman is reflecting our real-life universe: intellectual property keeps us from reaping the benefits of assistive technologies. Private ownership won't even let us imagine some possible futures. As a result, we don't have a cyborg with sturdy machine limbs, we have a much flimsier superhero. Image by Win McNamee for Getty Images.

Not Your Father's 'Bionic Woman' [Associated Press]

More importantly, The Bionic Woman is about Jamie's hot-rodded female body—there's no room for a male cyborg. Jamie is spied upon by uber-daddy Jonas Bledsoe, who steps in when she's about to have hot bathroom sex with Mr. Right Now. When Jamie complains, Bledsoe informs her that "those legs, that arm, that ear and that eye belong to me." She is a very expensive possession, a trophy wife in the way no male bot could ever be. Jamie's body is no longer her own—she belongs to the Berkut Group. Similarly, in a moment of post-coital truth telling, original bionic woman Sarah Corviss tells Jay, "I think someone hacked me," when he asks why she killed 14 agents. No matter how much power Sarah and Jamie pack, they are ultimately at the mercy of higher, most likely male, forces. Besides, watching two fembots fight = hot, which is probably why last week's footage of Sarah and Jamie is recycled. We also get to see Jamie fight a Bad Guy. She knocks him out—but ultimately must be rescued by her supervisor, Antonio.

The episode's big moment comes when Jamie, after saving a woman from committing suicide, realizes she needs a Larger Purpose in life. She tells Bledsoe she'll help save civilization as we know it, but she has to be home by 7:00 every night, can't work weekends, and needs Becca added to the company health plan. If you need any further evidence that this show is indeed a fantasy, Jamie's new boss agrees to her demands without blinking an eye.

Being possessed/getting saved by men and trying to be a good mom to her annoying little sister prove that despite the ability to run 60 mph or more, shatter brick with her arm, and bend steel with her grip, Jamie is really just a girl at heart. After all, she only breaks Mr. Right Now's rib by mistake. And her feminine nature means she loves gossip—something manly men find annoying. "I'm not a big fan of eavesdroppers," says Bledsoe when he catches Jamie in the act, no doubt forgetting that he's the dope that gave her a bionic ear in the first place.

After doing her bit to save the world (or at least select American cities) from a rogue organization trying to unleash a deadly toxic attack, supermom Jamie makes it to Becca's talent show on time, where little sis is performing a number from "Annie Get Your Gun." Which number remains unknown, as NBC in its marketing wisdom plays another song over the scene. Nevertheless, all is comfy and cozy heading into next week.