On Tuesday, Ella's cast was removed for the second time. It was a far different experience than the first. She knew what was happening right away and didn't want to take it off. Eventually, she relaxed and I put her in the bath. We were eager to see whether she'd revert to using her dominant hand like she had the week before. Happily, she didn't. In fact, she played in the bath for 20 minutes without using her right hand at all. After the bath, she worked with Sarah, continuing to play with puzzles and other toys with her left hand as she's done for the past two weeks. Sarah encouraged her to try some activities with two hands, like drinking from a cup, which she did. (That sight brought tears to my eyes.) But she showed a definite preference for using her affected hand, out of habit.
That's a big feature of hemiparesis; much of the impairment is caused by "learned non-use." When it's harder for a child to use one hand than the other, non-use becomes a habit that accentuates the impairment. It was amazing to see that Ella had learned a totally new habit in just two weeks, and it seemed to confirm what I've been noticing -- that control of her left hand doesn't require as much concentration as it did before. It's become more natural and spontaneous, and gives us hope that the changes in her brain that are allowing her to function so well may be permanent.
Here's a little neurology lesson, so if you're not interested in the details, feel free to skip this part. I hope the information is valuable to other people dealing with hemiparesis, and interesting to those who are curious about the brain. I also hope I get it right, and will count on Dr. DeLuca to correct me if I don't.
While Ella continued therapy without the cast, Stephanie DeLuca, the Co-Director of the Sparks Clinic, helped me understand what we believe is happening in Ella's brain. As I watched Ella performing tasks with her left hand, I noticed that her right hand was mimicking the movements of her left. I knew that all children are born with "associated movements," and these movements can persist even into adulthood. In kids with hemiparesis, they can be very strong. Before we came to Birmingham, Ella's affected hand mirrored the movements of her dominant hand very closely. It was difficult for her to remove an object that we placed in her left hand, because when her right hand gripped the object, her left hand gripped harder, too. She had no ability to open her left hand while her right hand was clasping. This is caused by an "overflow" of brain activity from one hemisphere to the other. It doesn't go away completely even in typically developing children. (A friend of mine who has completed firearms training explained that in order to pass his test, he had to demonstrate that he could grip something tightly with one hand without accidentally pulling the trigger with the other.) Since we can't see what Ella is doing with her dominant hand under the cast, I was concerned that she might be learning to control her left hand by consciously controlling her right. I worried that this might be the only way for her to learn to use her left hand, by "remote controlling" it, so to speak. When the cast came off and I saw her dominant hand moving in sync with her her left, it appeared to confirm my fears. Fortunately, Dr. DeLuca was there to explain that it doesn't work that way. She explained that Ella has not yet reached a point where her brain has completely "separated out" her right arm from her left arm. She still has overflow that is fairly age-appropriate. Knowing what we do about neuro-development, Dr. DeLuca can tell us with certainty that new pathways on the right side of Ella's brain are controlling her left hand, rather than some clever use of the left hemisphere. Dr. DeLuca also explained that Ella's associated movements will greatly diminish, and that when that happens, i.e. when her arms "separate out," she will have little function in her left hand except what she has learned through developing these new pathways in her brain. Since the brain is so receptive to this type of development between the ages of 1-3, this is a crucial time for us to be here. It was all very fascinating, and I've appreciated the time taken by Sarah and Dr. DeLuca to help us understand it so we can use it to shape the ways we continue Ella's therapy at home.
That's the end of the neurology lesson. Ella's cast comes off for good on Monday. She'll have four days of bilateral (two-handed) therapy before we go home, in an effort to integrate the abilities of both hands. It will be an important week for us to learn how to help her do this. We'll be choosing strategies, like reserving certain foods or snacks for eating with her left hand to keep it limber and functional. We can designate left-hand-only toys in addition to her regular toys. We'll make sure she keeps having the carefree fun that all kids should have, and not a lifestyle dominated by therapy. It's our mission to build activities into every day that feel natural while encouraging her to exercise her left hand.
We couldn't be happier with the success so far. At the same time, we're starting to understand the continued effort required to maintain the success. This program is not magic. It's not a cure. The gains aren't maintained without continuing therapy, vigilance, and consistency from all of us. Until Ella's old enough to decide that she wants to make the most of these abilities, it's up to us to keep her from losing them, and to keep pushing the boundaries of what she can do. Today, she can pick up marbles with her left thumb and index finger. She can eat raspberries the same way. She can scribble with markers, push buttons and open drawers with her left hand. She's unlearned the non-use. She's developed more motor control than we'd dared to hope for. On Christmas Eve, we will take the energy and excitement of Birmingham home with us. In a way, the end of this program feels more like a beginning. This "event" that we planned for is starting to emerge as a milestone on a long continuum that is looking brighter and more hopeful than ever before.