Do muscles that twitch change as a result?

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Eelko

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Do muscles that twitch change as a result?
« on: 19/04/2011 18:30:03 »
Eelko  asked the Naked Scientists:
   
Hi Naked Scientists,

When a heart has weakened there are several options to increase the power of the blood flow.  One of them is creating a second heart from a large muscle out of your backside.  In short this muscle is wrapped around a blood vessel and then given an artificial sinus rythm that matches the true heart. This makes the muscle contract and relax at the pace of a heart muscle. The fibers in this muscle are different from heart-muscle fibers, but from that moment on start to change into heart-muscle tissue. This change in muscle tissue has been well documented.

Still, I wonder. People with diseases like Parkinson also have involuntary continuous movements of certain muscles (arm-, neck-, leg-muscles) just like those artificial continuous contractions of that support-heart. Does muscle tissue of Parkinson patients also show these changes?

Cheers,

Eelko

What do you think?
« Last Edit: 19/04/2011 18:30:03 by _system »

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Offline RD

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Do muscles that twitch change as a result?
« Reply #1 on: 19/04/2011 19:14:51 »
Can't find an example of skeletal muscle being used to power an artificial heart in humans, only dogs

http://www.ncbi.nlm.nih.gov/pubmed/1457912

http://www.ncbi.nlm.nih.gov/pubmed/8944958

skeletal muscle (e.g. in arse) is different from heart muscle, arse muscle would tire and stop contracting after hours, it's not adapted to work continuously like heart muscle.


{The nearest thing I have found in humans ... http://en.wikipedia.org/wiki/Cellular_cardiomyoplasty}

« Last Edit: 19/04/2011 20:03:24 by RD »