Muscle Action

A muscle has to complete its full action.  Everyone thinks of the biceps as the muscle that bends the elbow. But part of its job is also to supinate the hand(turn the palm upward).  If you turn the palm down and bend the elbow, you’re shutting off the biceps and using a muscle called the brachioradialis to bend the elbow.  This is because you’re not allowing the biceps to complete its full action so it doesn’t do anything.  This is why doing a pull-up is easier with your palms facing you.  With muscles, it’s all or nothing.  Muscles don’t compromise with you.  Another example of this are the glutes(butt muscles).  When you’re lying prone on your stomach and do a press up, not a push-up, a press-up(lifting up your upper body with your arms keeping your lower body on the ground), your butt is probably contracted.  Part of the job of the gluteus maximus is to externally rotate the hip(point the toe out).   So, when lying prone(on your stomach), if you point your toes in, this shuts off the glutes and they will not be recruited at all when doing a press up.  After a stroke, I have no idea.  This would still be the case for some muscles but maybe not for all because all the wires are different as a result of us having to rewire the brain.



Categories: Brain stuff, Health, Recovery, Rehab, Stroke stuff

Tags: , , , , , , ,

34 replies

  1. Hello

    I have been reading your blog for some Time and I understand that you like eastern Ancient medicine . If that is true than I would like to share my experience about recovering using Ayurvedic clinic in Kerala state of India . At present I Am in India for three weeks of treatment using Ayurvedic massages. Please Let me know if you want more information.

    Zpatzer Sent from my iPhone

  2. Even the basics are different between one person and another in rewiring and action after a stroke.For example my leg. I drives the PTs and neurologist wild with frustration during e-stim and Botox. Granted certain muscle actions cause the foot to envert and dorsie flex that’s pretty much standard, right? Not with the way my brain is rewiring now. They can get my foot to evert or dorsie flex but not at the same time. I’ve had as many as six pads on my leg without getting both. It’s one or the other. You may think they are not putting them on the right spot, but that’s not the case. Many have tried (8) and failed. Even with an EMG needle guide for Botox, it’s haphazard at best trying to relax the muscle involved and their response. I’m just abby normal that way.

    • Jo, I think if you have a Bioness L300 demo, you might see your foot Doris-flex and evert at the same time. That’s what mine does, and it worked during the first demo I had, which totally stabilized my ankle. I still have occasional foot drop when I’m not paying attention, and my gait ain’t pretty, but I’m happy with it.

      • Are you sure you don’t mean invert. When electrodes are placed on the tibilalis anterior, the foot will dorsiflex and invert, not evert I believe. I am starting to dorsiflex my foot when I walk but sometimes, when I try too hard, my foot inverts as well as dorsiflexes. I don’t want to pass on misinformation because I don’t have the proper understanding of this, so Amy could you weigh in on this please? Thanks.

      • Barb, I’ve had some success with the Bioness unit. The problem is cost. I can either pay for my husband’s funeral or the unit. The other The other problem is the clonus goes into hyperdrive after wearing the unit for any length of time.

        • Jo,

          Yes, the cost is high and not covered by insurance, but, at least up here, there’s a rental program; it’s a rent-to-own, so that if you fall in love, it’s already partly paid-for.

          So sad about your husband;,is he comfortable?

          Barb

          Sent from my iPhone

          • More comfortable than I am. What man wouldn’t be with7 women waiting on him hand and foot? Actually his pain levels are now 3 out 10 which is the lowest they’ve been for 4 years. He is still sleeping 20 hours out of 24.

    • Dorsiflex is all one word.

  3. I love your explanations of muscle action, its what I should have been told in the hospital but everyone assumes that stroke patients are stupid.

    • I was told but didn’t understand at the time. Now I know to engage cerain muscle groups for movement.

    • Dean they most likely didn’t know this stuff. We’re taught all of this in school but then people graduate and go out to work in different fields like neuro, pediatrics, acute care, etc. I went into outpatient orthopedics and used this stuff everyday in my practice so all of this is second nature for me. But a neuro therapist, particularly an inpatient neuro therapist doesn’t remember this stuff.

  4. We were just talking about the various ways of doing pull-ups and why some ways palms in were easier. I can’t wait to show this to my husband. Thanks Amy!

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