hapticity » completely awesome http://hapticity.net Wed, 16 May 2012 14:41:50 +0000 en-US hourly 1 #/?v=3.5.1 “We’re stimulating areas of the retina that are downstream from the rod and cone cells… [to] directly send impulses to the brain.” /2010/01/03/were-stimulating-areas-of-the-retina-that-are-downstream-from-the-rod-and-cone-cells-to-directly-send-impulses-to-the-brain/ /2010/01/03/were-stimulating-areas-of-the-retina-that-are-downstream-from-the-rod-and-cone-cells-to-directly-send-impulses-to-the-brain/#comments Sun, 03 Jan 2010 19:57:23 +0000 Dave /?p=3627 Watch this beautiful video by National Geographic about Jo Ann Lewis, the 17th recipient of a bionic eye implant. The video shows the surgery itself, so it may be unsettling to some. Because I know the surgeon is making a blind woman see, the gore a non-issue for me. From a technical standpoint, it’s a rare and fascinating close-up of a procedure to wire up a sensor to a human nerve.

The name of the surgeon is Rand Spencer, M.D., and we need many more like him.

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A touch saves a life /2009/11/21/a-touch-saves-a-life/ /2009/11/21/a-touch-saves-a-life/#comments Sat, 21 Nov 2009 07:53:59 +0000 Dave /?p=2279 The Moth is a stand-up storytelling podcast I’ve been enjoying lately. An especially moving story was told by Mike Destefano. When he had reached the rock bottom of his life, having lost his wife, his father, and his will to live, a mentor literally reaches out to him, touches him, and changes everything:

The flame that I had as a kid, all of it, gone. Because now everyone died. All at that one moment, you know? And I made arrangements to fly home the next day, and I got on the plane, and when I got on the plane I decided that I was going to end my life. I’m pretty much done. And I wasn’t telling anyone, it wasn’t a threat, it was a total fucking decision that I’ve pretty much had enough of this. There is no more, nothing else to live for, and I’m done. So I got on the plane, and I was so excited because I’m like, I’m really going to fucking die, this is so great! I was thrilled and at peace. And I couldn’t wait until the funeral was over, because that’s when I’m going to do it. I’m not going to jump off a building or in front of a car. You people ever heard of overdosing on drugs? …I get up and go to the back of the plane to go to the bathroom and… the monk that I had met was sitting in the back row… And he put his hands out like he did before, again… and it worked for me… it just, it worked. And I got home, and I quit my job and I said, you know what? I want to be a fucking comedian.

Listen to the whole thing.

[audio:moth-podcast-89-mike-destefano.mp3]

Download (mp3, 17 MB)

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Targeted reinnervation /2008/09/28/targeted-reinnervation/ /2008/09/28/targeted-reinnervation/#comments Sun, 28 Sep 2008 23:36:09 +0000 David Birnbaum http://tactilicio.us/?p=145 A woman’s nerves have been rewired to help her control a prosthetic limb, an experimental procedure for amputees called targeted reinnervation. It’s a fascinating concept, and it works: a noncritical muscle’s nerves are deactivated, and the severed efferent (motor) nerve fibers from the missing limb are inserted into the muscle. The brain can then control a prosthesis by sending motor signals to the muscle. Additionally, the afferent (sensory) nerve fibers from the severed limb are moved to the skin above the same muscle. Stimulation of those nerves are now mapped as sensation originating from the prosthesis. Claudia Mitchell can control her prosthetic arm by sending motor signals to her chest muscle, and experiences cutaneous sensations in her prosthetic arm when the skin on her chest is touched or its temperature is changed.

Of course, rather than simply explaining the news in as clear a way as possible, ABC proceeds to extremes: “Mitchell has become the first real ‘Bionic Woman’: part human, part computer.” She’s first and she’s real, and you can tell because ABC even awarded her the official capitalized title of “Bionic Woman.” Presumptuous, and also inaccurate. In fact, this technology is exciting because it doesn’t have much to do with computers at all. Rather than relying on predictive software to control the motors in the prosthesis (which was the technique used in this BBC producer’s prosthetic foot), Ms. Mitchell controls her hardware directly, with her brain.

In any case, the success of this procedure has led to some interesting discoveries, such as the fact that Ms. Mitchell retains a 1-to-1 mapping of her reinnervated afferent fibers to locations on her prosthesis.

Paul Marasco, a touch specialist and research scientist with the Rehabilitation Institute of Chicago, was brought in to study the hand sensations that Mitchell feels in her chest. He put together a detailed map, connecting what Mitchell’s missing hand feels with the corresponding locations on her chest.

Depending on where you touch her chest, “she has the distinct sense of her joints being bent back in particular ways, and she has feelings of her skin being stretched,” Marasco said.

If a human’s nervous system can be extended to include a prosthesis, it isn’t a stretch to imagine that it can be interfaced with external signal networks, such as other humans’ nervous systems, or the internet. How will this affect embodied cognition? Societal structure? Consciousness?

Here’s a video of Claudia in action. Seems like she’s got style too—the upper part of her artificial arm is covered in a camoflauge pattern. Seen!

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"Take a look at this picture and think about what you can do." /2008/05/30/take-a-look-at-this-picture-and-think-about-what-you-can-do/ /2008/05/30/take-a-look-at-this-picture-and-think-about-what-you-can-do/#comments Fri, 30 May 2008 18:43:28 +0000 David Birnbaum http://tactilicio.us/?p=112

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Head-related haircut /2007/07/16/head-related-haircut/ /2007/07/16/head-related-haircut/#comments Tue, 17 Jul 2007 01:17:47 +0000 David Birnbaum http://www.music.mcgill.ca/~birnbaum/blog/?p=36 Put on a pair of (good) headphones and enjoy this beautiful binaural recording. (Note: headphones are essential for the experience. Listening on speakers will not work!) It goes to show that well recorded sound can be very effective even after it’s terribly distorted by YouTube compression. Thanks to MissChievous for the heads up!



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