Saturday, February 15, 2020

Spasticity: Can ANYTHING be done?

What reduces spasticity? 
Does anything eliminate spasticity?  

Below is an outline of various spasticity-reduction treatments.

Treatments that will permanently 
reduce or eliminate spasticity.

The neuroplastic model of spasticity reduction. I developed this one years ago. You can find an outline of it from my book here. It is the only non-surgical, permanent option on this list. Here is the emerging evidence for the "neuroplastic model of spasticity reduction."
Note: there is a lot of other clinical evidence that this model works, but it is typically wrapped up in research of other therapies that use a lot of repetitions.  Here are some of them:

Dorsal root rhizotomy (or selective dorsal rhizotomy). The one "medical" thing that does reduce spasticity in a long-term way is the one that nobody ever talks about. It's neurosurgery— this is in children, but they do it in adults as well. For the right person, its perfect and permanent.   

Treatments that will temporarily 
reduce or eliminate spasticity.

Ice. If you ice the spastic muscle for about 20 to 30 minutes you'll get about 20 minutes to a half an hour of a reduction in spasticity.  

Heat. Don't do it. It exacerbates spasticity.  

Weight-bearing. This is one that a lot of therapists love. Whether you're standing on the leg that's spastic, or putting weight through the upper extremity that spastic, there is a reduction in spasticity. That reduction will last until the next big volitional movement and then the survivor will be right back to where they started.  

Stretch. Always the first line of defense. There's a lot of good reasons to stretch, but it does absolutely nothing in the long-term. This was established by not one but two Cochrane reviews. It didn't even reduce contracture formation.  

Botox (and other neurolytics). Back in the day there were a couple of formulations of Botox. Eventually you would become immune to one so they'd use the other one. You'd  become immune to that, and that was the last time it would be effective. Now they have so many formulations that you can be on Botox for the rest of your life. It's a Band-Aid. When it wears off, it's done. It's also an expensive, and often painful Band-Aid. Oh, and it gets in the way of my neuroplastic model.

Electrical stimulation (E-Stim)Typically this involves reciprocal inhibition of the spastic flexors. Put simply: You E-Stim the muscles opposite the powerful felor muscles that cause the problem. Example: E-Stim the elbow extensors (triceps) to relax the elbow flexors (biceps, etc.). various doses will provide a temporary reduction is spastcicity.

Monday, January 6, 2020

Sorry not Sorry: Stroke Recovery is NOT Proximal to Distal.

There's an old saying among clinicians: Recovery from stroke is proximal to distal. That is, there is a predictable pattern of recovery: proximal (closer to the body) to distal (further from the body). 

Assuming this may hurt recovery.

The 'proximal to distal' crowd would say recovery in the arm/hand would be in this order:

first to come back are the muscles in the shoulder and shoulder blades, 
then progress to the elbow, 
then to the forearm, 
then to the wrist, 
then the hand, 
then the finger joints close to the hand, 
then the finger joints furthest from the hand.…
But proximal to distal is not accurate any more than assuming that the sun circles the earth because it always rises in the east and sets in the west. Both are based on observation, but neither is based on what is actually happens. 

Here's what actually happens:

1.   You have a stroke; one side of your body is affected
2. The proximal muscles (i.e. shoulder) have bilateral innervation; both sides of your brain control the proximal muscles.
3.  Your shoulder comes back first not because of the "proximal to distal rule" but because your brain never ceded control over the shoulder muscles.
4.  The clinician sees the shoulder coming back before everything else and figures, "That's the proximal to distal rule!"

You might argue, "If the shoulder comes back first, then maybe the reason is wrong, but its a distinction without a difference. Survivors will still see proximal to distal return."

But what if the fingers are coming back first? Clinicians may not think to test the hand because the shoulder is not back. Or they may focus on shoulder control even though the hand can drive shoulder control if hand movement is recognized and encouraged.

In the lower extremity, the problem can be even worse. Proximal muscles would move the hip, and those are what are focused on. Meanwhile, an AFO (ankle brace) is routinely put on the survivor even though the ankle (a distal moment) may be coming back on its own.

And AFOs are easy to walk into, but hard to get rid of.

Sunday, November 17, 2019

Clinicians: When it comes to stroke recovery: KISS

When it comes to stroke recovery, clinicians would do well to keep it simple.

There's two important reasons...

One. The coolest new stroke recovery stuff comes from neuroscience. And the neuroscience perspective makes things really simple. 

People hear the word neuroscience and they assume everything's going to get really complicated really fast. And while there is nuance in the brain that wins people Nobel Prizes, the global perspective neuroscience provides simplifies recovery. There is good news for people like me who spend a lot of time trying to explain stroke recovery: Some of the greatest neuroscientists in the world are really good at making the brain simple.

In other words, just as you don't need to know where the carburetor is— or even what a carburetor does— you can still drive a car. We don't need to memorize Brodmann areas, or the role of the substantia nigra, or the details of fMRI to understand how the brain works. What's much more pertinent, and much more interesting, are the global perspectives neuroscience provides. That is, if you use neuroscience not to answer "what is a carburetor", but instead to answer "where does the key go?" Where's the knob for the lights? Where's the turn signal? When it comes to the global perspective, neuroscience begins to answer simple but vital questions. Like:  

What does the brain pay attention to? What forces the brain to learn? What kinds of things can fool the brain into learning? What kinds of things—what kinds of simple things—can be used to challenge the brain in a way that's productive for relearning movement after stroke?

Two. The other reason it's simple is purely technical. Only the owner of the brain can drive changes in their brain. Because learning, including what's called motor learning after stroke, requires that the survivor understands the process, on some level at least, it has to be simple. 

Nobody likes complexity. But complexity can be even more vexing to somebody who has suffered a brain injury. Don't get me wrong, I've met plenty of survivors that are smarter than I am after their stroke. But most people have had a stroke are focused on recovery and keeping their life somewhat on track than complicated recovery options.

To review... 
It has to be simple because it is simple, and because stroke survivors generally don't do complicated.

Here's the good news: the stuff that works the best is really simple. It relies on core concepts like bilateral training, introducing rhythmicity, forcing use, repetitive practice, etc

I do a lot of talks to clinicians. And it's amazing how many people will trust a complex treatment that they really don't understand over a simple treatment that they would have understood the moment they learned how to walk. What I would counsel therapists is this: If it's too complicated for you to get it from a simple explanation, you should probably save your money and save your patient's time, because that complicated stuff usually doesn't work.

Saturday, October 5, 2019

What is stroke recovery?

What are stroke survivors trying to do? They're trying to move better. 

Where does better movement come from? The brain!

Is the brain learning (new brain connections) or relearning (using existing connections)?

This debate has been around for a long time. Here's the question restated: If you've had a stroke and you're learning how to move better everyday. Is that movement learning or movement relearning? Is it new stuff (new neuroplastic change) or are you reactivating a part of the brain that used to do that movement?

I've been pretty successful selling to the world that it is all about neuroplasticity-- that it's all new learning. But that's only once the plateau has been reached. You know the plateau, that first big reduction in recovery? Prior to that most recovery comes from the brain "healing" (although "coming back on line" is a better description).

Click image to make bigger

So, lets review:

Prior to the plateau: Using brain that already knows the movement.
After the plateau: Using new brain to do the old movement.

Thursday, September 19, 2019

Mental Practice Recordings now available!

Bottom line: We studied the effects of mental practice (MP) on stroke recovery. We used recordings so that participants would have a guided imagery experience. These recording were never made available to the general public. Now, an analog is available.  

To find the recordings, do this: At the top right-hand side of this web page is a button that says Mental Practice Recordings for Stroke Recovery. You'll find the recordings there.

My first job in clinical research was at the Kessler Institute in New Jersey. I was teamed with a scientist, Stephen Page. Steve had been a D1 swimmer at University of Tennessee. Prior to getting into rehabilitation I was a musician. So we had an athlete in the musician.  And we had support from Kessler's very large research department.

Early in our relationship Steve told me he wanted to do a study on mental practice (MP). MP is what athletes and musicians do to practice. But they don't actually physically practice, they only imagine the movement. When Steve told me he wanted to MP with stroke survivors I advised him against it. I didn't think the very soft "imagining" would get its butt kicked by the realities of hemiparesis and everything else that comes with stroke. A few weeks later he came to me and said, "I want to do mental practice for imagery with people with stroke". And again I advised him don't do it. And he countered with, "Well we got funding." So I said, let's do it!

There are a few things that our lab was known for. We were known for dosing studies with electrical stimulation. We were known for being the first to modify constraint induced therapy. Sometimes we combined MP with modified constraint

And we were known for early mental practice. Here's an early one, here's a later one. The MP stuff may have had the biggest impact. Therapists like it because they don't have have to burn through a lot of clinical time because the survivor did it themselves. And it didn't stress the survivor for two reasons:

1. There was a deep breathing part to begin and end the MP session, so it may actually reduce stress.

2. There was no actual movement, only imagining the movement, so there was no muscular stress.

And survivors liked it because they could do it on their own. they could do it after they had been discharged from therapy. And its didn't cost them anything.

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