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  1. #1
    Registered Member livingtwisted's Avatar
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    Default Could the Psoas Minor play a role?

    I'm hoping someone can disprove this for me so that I can stop wondering about it...

    I just learned that some of us have a psoas minor on just one side (because we are in the process of evolving out of it)... see link here: http://www.anatomyatlases.org/Anatom.../40Psoas.shtml

    To my lay brain it seems like if you had a psoas minor only on one side and it was tight this could create an imbalance in the lumbar spine or give the appearance that one leg is shorter than the other. I imagine people much smarter than me have either thought about this or know that it's not worth thinking about. But I have to ask...

    Has there ever been any research into a correlation between scoliosis and having a single psoas minor? Or is it just such a minor muscle, no longer used that it wouldn't have any effect? Is there any way to determine if you have one/two/none while still alive?

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    Administrator Dr Kalla's Avatar
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    My first idea to confirm if you only have a unilateral (one sided) psoas muscle would be to do an MRI. Not sure that would be enough. Second step would be to do surgery and have a look, but that would probably cause more harm than the good you would gain by knowing.

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  3. #3
    Registered Member livingtwisted's Avatar
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    Thanks, Dr.K. That does sound a bit extreme. I guess the real question is does it matter? Does it play a big enough role to throw things out of balance?


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    I realise this thread is over a year old, but I have the same question or concern. I have scoliosis in my lumbar region (concave on the left side). Having felt around myself, on the left side I can feel something that is very strong and like a tendon on the left side which follows the position and path of the psoas minor. It seems to be my psoas minor since if I'm lying down and lift my leg it I can feel it move and tighten and then disappear when I relax my leg. On the right side however, I don't feel anything like this.

    I guess, if there's no definitive way of knowing if I do only have it on one side, the question remains, "could it be playing a big enough role." In my case it seems to be aligned with point six of Livingtwisted's link: "Moser saw it present on the left and absent on the right."


  5. #5
    Professional DrStitzel's Avatar
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    Hi Fixmy spine,

    Do you have a somewhat recent picture of an x-ray you can post? Often you can see a "psoas shadow" on the x-ray if it has been chronically tight/shortened.

    Thanks.


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