We’re hearing more about ADHD-related challenges with something called “motor control.” What does that mean exactly? I’ll share a few examples and then results from a very interesting study.
My friend and I walked behind her little girl, age 7, riding her bicycle. Every 30 feet or so, she’d veer off the sidewalk, and hit the dirt. The little trooper always jumped back up—and on the bike. Undeterred.
Still, I found it painful to watch. Was it poor vision? She did wear eyeglasses, which kept slipping down her nose; perhaps that distracted her or marred her depth perception. Or was it something else?
Then there’s my husband, who had always described himself as clumsy. “I knock into things,” he’d warn, “so don’t put anything you value around me.”
Before we knew about ADHD, he mostly attributed his “Bull in a China Shop” tendencies to his Lumberjack-esque build.
Yet, there was also an issue of balance. For example, certain yoga poses eluded him, despite years of practice. Having taken medication for more than 10 years now, and for 6 years taking a class that works chiefly on balance, his “clumsiness” seems resolved. (For the most part. Hey, sometimes he’s still a big guy in small spaces.)
For years, I’ve also heard reports about “clumsiness,” from both adults with ADHD and their partners. It results not only in bumps and bruises but in broken treasured objects. Was there a connection between clumsiness and ADHD? Turns out, yes, there is. Some new research is particularly interesting.
We’ve long known that children with ADHD experience greater-than-average challenges with “motor control”—in particular, balance.
Almost 50 percent of children with ADHD have difficulty balancing and controlling motor function. This has been seen when testing children with minimal demands such as standing on a fixed platform, eyes open. With more challenging demands, such as standing with eyes closed or with visual surround that disrupt the senses, even greater impairments have been seen.
It’s been suggested that these challenges around balance might account, at least in part, for the increased risk of injuries in children with ADHD (and adults as well).
What Is “Postural Sway”?
Recently, a study focused on examining “postural sway” in adults with ADHD found evidence to explain this phenomenon.
Fortunately, this is one study you can download for free (Postural sway and regional cerebellar volume in adults with attention-deficit/hyperactivity disorder) and read it yourself.
First, to define postural sway (thank you, Wikipedia)
In biomechanics, balance is an ability to maintain the line of gravity (vertical line from centre of mass) of a body within the base of support with minimal postural sway. Sway is the horizontal movement of the centre of gravity even when a person is standing still.
In other words, postural sway looks something like this:
As you can imagine, excessive postural sway can be a hazard on the job:
I found the research results interesting for several reasons:
- It extends to adults with ADHD what we know about balance-related challenges in a sub-population of children with ADHD. This indicates these children might not “outgrow” these challenges.
- It emphasizes that ADHD is not a “cookie cutter” condition; not all subjects with ADHD experienced greater postural sway.
- It indicates a positive association between postural sway and gray matter volume in the posterior cerebellum. Lower sway was associated with smaller volume. (Here’s a good little video, The Function of the Cerebellum.)
- It provide first evidence of link between balance and cerebellar shape/size.
- It provides one more piece of physical evidence that ADHD is not all about “behavior,” that there can also be physical manifestations.
Thirty-two adults with ADHD and 28 control subjects performed various standing-posture tasks on a Wii balance board.
From the paper:
During each trial participants were instructed to remain as still as possible for the duration of the 30 s trial. The first 5 s of each trial were not analyzed. Postural sway was quantified as the path length (in cm) of the center of pressure (COP) (e.g., Bucci et al., 2014; Shorer et al., 2012).
Whole-brain structural MR images were collected for each participant.
Postural sway was significantly higher for the ADHD group, compared to controls. Higher sway was positively associated with regional gray matter volume in the right posterior cerebellum (lobule VIII/IX).
What do you think about these research findings?
Are you (or your loved one) among the estimated 50 percent
of folks with ADHD thought to have issues with balance?
If so, has that resulted in inconvenience or injury—
or perhaps the enticing challenge of a circus career?