April 19, 2021

Arm and Leg Synergies are Different and the Same

The affected arm is dominated by the flexion synergy while the affected leg is dominated by the extension synergy. This means muscles that straighten the knee and point the toes are strong while muscles that bend the hip, knee, and ankle are weak.  I also cannot move a single joint. 

To point my toes I have to straighten my whole leg (photo on left).  To bend my ankle I have to bend my hip and knee (photo on right).  All this unwanted movement is exhausting.
 Problem: My weak hip and knee flexors do not always lift my leg high enough to clear my toes as I take a step.  The extension synergy forces my toes to point.  The photo on the left shows me stubbing my toes.                                                                                                                                                      Solution: I faithfully wear my leg brace because it lifts my toes up which prevents falls.  
Problem: The extension synergy makes my affected knee snap into a fully straightened position every time I take a step.  This abnormal movement will eventually damage my knee.  Muscles on the back of my thigh (see pink line) are too weak to stop my knee from snapping into this dangerous position.

Solution: My leg brace keeps my knee slightly bent (see green line) when I take a step.  I faithfully wear my leg brace because I do not want to have knee surgery.  homeafterstroke.blogspot.com

20 comments:

  1. Thank you for the explanation. Even though my PTs have tried to explain some of my gait issues, your summary (and the photos) is very helpful.

    ReplyDelete
  2. Humm.. this all has me very curious. I'm wondering if I am creating problems for the future. I seem to walk pretty well, but I'm not sure if it's correct. I'm going to have to investigate my gait further. My shoe always falls off the affected side so I'm guessing there is weakness somewhere even though I get around very well. Thanks for pointing this out!

    ReplyDelete
  3. I love your technical descriptions - with photos - of what is occurring to stroke muscles. Which brings up the question, why do my toes curl if my foot is extending?
    Thanks,
    Dean

    ReplyDelete
    Replies
    1. A muscle that curl you toes (flexor digitorum longus) originates in the calf and crosses the ankle joint along with muscles that straighten your ankle. Since these muscles lie side by side it is difficult to fire one muscle without firing the other. Synergies in stroke survivors are all about recruiting groups of muscles together whether we want to or not.

      Delete
  4. Thanks for the explanation. I'm getting a better understanding. Wish I could see your brace. I have a lot of hyperextension in my knee which causes me to walk stiff legged. Also have 'drop-foot', though I've been told it's not that bad. My walking is very exhausting and have considered a walk aid.

    ReplyDelete
    Replies
    1. Some stroke survivors hate their leg brace. Because I live alone I walk a lot when I do ALL my shopping. My leg brace increases my endurance so I don't have to go home half way through an outing. What's most important varies from person to person.

      Delete
  5. Are you doing exercises without your brace on? The reason I ask is that I have found that to get full range of motion, the brace should be off.

    ReplyDelete
  6. All the exercises I do for my hemiplegic leg I do with my brace off.

    ReplyDelete
  7. Rebecca, thanks for the straightforward, helpful post. I had a hemorrhagic stroke about 3 and 1/2 years ago with right side hemiplegia and significant aphasia (initially including total inability to talk). For about 2 years I used a brace that allowed my right foot to rest an a custom, slender but strong platform. The platform was connected to a tailor-made piece which extended around the back of my calf from the platform up to the top of my calf. A mechanism allowed my foot to move up and down within a restricted range of motion (no "drop foot"), Three velcro straps held the brace on.

    ReplyDelete
  8. can anyone explain. to me why my foot turns outward. during a forward. stretch? any way to improve it?

    ReplyDelete
    Replies
    1. When I have a problem I can't solve I ask my doctor to send me to out-patient therapy. I'm not shy about telling therapists about the specific problem I expect them to address during the current round of treatment.

      Delete
  9. Rebecca, thank you for opening up for followers. I'm post stroke x 30 days. It is extremely insightful. I wouldn't dream of standing without my AFO. One near fall was enough. Unlike you I've had a knee and hip replacement prior to my stroke which compounds the therapy issues. Ah such is life. Your blog helps.

    ReplyDelete
  10. I hada stroke 3 years ago due to a motor accident i have left side weekness im useing an afo and lately im finding it imposible to walk my toes and foot keep curling down in it can anyone help me

    ReplyDelete
    Replies
    1. I've gone back to out-patient PT twice when I had a problem with walking.

      Delete
    2. Doctors and insurance companies take safety seriously. Your curling toes are a potential fall hazard. Ask your doctor for a presciption to "increase safety while walking."

      Delete
  11. I've recently started back to out-patient PT. My leg is really swinging out (In a circling motion) with each step I take. Do you think a brace will make me walk with a more normal gait? I was informed that my hip is weaker & the hyper extended knee is not getting better. I keep blaming all this on the spasticity. But could it be I need a brace for support?

    ReplyDelete
  12. These are great questions to ask your PT. When I go back to therapy I always have one goal I want to achieve - like being able to walk farther on the boardwalk in Point Pleasant Beach or increased safety when making turns in the kitchen while preparing lunch. Therapy should be more personal than "have a normal gait" or "reduce spasticity."

    ReplyDelete
  13. I had a stroke six months now, everything works ok except my right leg, it gets stiff especially when I get anxious when someone is watching me walk im so conscious of condition my husband says I need more therapy, but I can not afford health insurance so I can't see a doctor or therapist. What can I do to help myself, I walk everyday. My county broward 33068. Thanks

    ReplyDelete
  14. Quickly this site will indisputably be famous among all blogging people, because of its fastidious articles or reviews.

    stroke prevention guidelines

    ReplyDelete
  15. This is a great website so far! I'm so glad I found it, I am PAM a 52yo stroke survivor of just over 3 years and am finding myself getting very depressed about the slowness of my healing, I thought I would be close to being almost back to normal by now and I';m not even close :( I've been to out patient therapy both OT & PT twice since my stroke (that's all that I could squeeze out of insurance) and I just don't feel like I'm progressing, I have had some spontaneous healing as in my extremely tightly curled shut stroke hand(left side) just one day relaxed on its own and opened up-whew! that was a good day but my walking is such a struggle that it wears me out and im at the problem point of getting from the bed to the bathroom in the mornings I do wear an AFO brace on my left leg and cannot just spring out of bed and walk to the bathroom like I used to be able to (I have drop foot and cannot walk on my left foot whatsoever without my brace) so I'm wondering if anyone who's already been down this road can tell me what the next step in the learning process is for this; should I a) learn to get my AFO and non slippery footies on as fast as I can upon waking and then walk myself there or b) is there some trick or device designed to get through this phase?

    ReplyDelete