leg muscle anatomy
leg muscle anatomy
WEDNESDAY, Sept. 25 (HealthDay News) — Scientists address aboriginal advance in efforts to actualize bigger automatic legs that will faculty assumption signals and apperceive how their users appetite to move.
Last fall, one such “smart limb” helped 31-year-old Zac Vawter ascend 103 floors of Chicago’s Willis Tower.
Vawter, who absent his adapted leg afterwards a motorcycle accident, was aggravating out a advanced prosthetic prototype, now the accountable of a new address appear in the Sept. 26 affair of the New England Journal of Medicine.
Vawter “can do abounding accustomed activities like walking up and bottomward stairs,” said Levi Hargrove, a analysis scientist at the Rehabilitation Institute of Chicago and advance columnist of the study. “He can alike reposition the prosthesis by cerebration about it.”
The mind-controlled prosthetics are still in development and far from accessible for prime time. It’s additionally not bright how abundant they ability amount or if they’ll be adapted for best amputees, according to the study.
But appeal is there, Hargrove believes.
Modern leg prostheses accept abundant limitations. Some are simple, artless accessories that accredit walking on akin ground, but abridgement a ability addition to advice users do annihilation added challenging, Hargrove said. Bogus legs can additionally be difficult to use on stairs and slopes.
Some bodies who’ve absent a leg, such as an earlier actuality with diabetes, may artlessly appetite to airing about the abode and acknowledgment to the community, said Dr. Howard Gilmer, an accessory physician at MedStar National Rehabilitation Hospital in Washington, D.C., who was not complex in the study.
But war veterans and blow survivors who’ve absent limbs may appetite to acknowledgment to a abundant college akin of activity, he said. That’s area bogus limbs that acquiesce bodies to run or absorb time in baptize appear in.
In the new study, advisers appraise a affectionate of technology advised to accord added ascendancy to amputees who accept a powered prosthesis.
The technology detects alleged “electromyographic” signals in the thigh analysis that commonly acquaint the analysis of the lower leg what to do. The academician continues to accelerate the signals to the leg alike back the absolute leg is gone, Hargrove said.
If all goes according to plan, the technology picks up the signals and moves the automatic leg in the way the user intends, said Hargrove, whose assignment is actuality accurate by an $8 actor admission from the U.S. Department of Defense. Added than 1,200 American account associates accept absent limbs in the wars in Iraq and Afghanistan.
But there are some caveats. The address acicular out that it will be a claiming to architecture a prosthesis that will aces up the able signals yet be adequate to wear. Also, the accessories “must be fabricated added reliable, quieter, smaller, and lighter to account beyond numbers of amputees,” the abstraction authors noted.
Gilmer mentioned added challenges. The weight of a prosthesis is a cogent issue, he said, as is its acknowledgment to damp from sweat. He said manufacturers will additionally accept to amount out how to ability the accessory afterwards defective too abundant recharging. And, the different analysis of the butt actual afterwards amputation may actualize challenges, he added.
There’s addition issue: cost. Prostheses can amount tens of bags of dollars. Still, Gilmer said, the abeyant for bigger prostheses is a “big deal.”
Copyright © 2013 HealthDay. All rights reserved.
SOURCES: Levi Hargrove, Ph.D., analysis scientist, Rehabilitation Institute of Chicago; Howard Gilmer, D.O., accessory physician, MedStar National Rehabilitation Hospital, Washington D.C.; Sept. 26, 2013, New England Journal of Medicine
leg muscle anatomy – leg muscle anatomy
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