Neuroscience
The Brain's Control Center Is Both One Thing and Many
A review of cognitive control explains why Kabuki syndrome shares attention, memory, and impulse struggles with many other conditions.
What is cognitive control?
It's the mental skill that keeps our actions goal-directed and flexible, instead of running on autopilot. It helps us focus, stop unwanted actions, hold things in mind, and switch between tasks.
Where does it live in the brain?
Mostly in the front part of the brain, called the prefrontal cortex, working with connected regions. This area isn't one single piece. It has many sub-regions with different jobs and connections.
So is it one skill or many?
Both, it turns out. Cognitive control has 'unity and diversity': separate abilities like updating memory and switching tasks, plus a shared core that ties them together. That shared core is largely about holding a goal in mind and using it to guide what we do.
Why does this matter for Kabuki?
Weak cognitive control shows up across many different conditions, not just one diagnosis. Understanding how genes shape the prefrontal cortex and its control networks is a key goal for future research and new treatments.
Many children with Kabuki syndrome face challenges with attention, memory, and self-control. A new review helps explain why—by examining the part of the brain that manages these very skills.
That part is called the prefrontal cortex, and scientists believe it acts as the brain's control center. When it works well, we can pause before acting, switch between tasks, and stay focused on a goal.
This review asks a big question: is this kind of control one single skill, or many smaller skills working together? (5) The answer matters for families trying to understand exactly where their child struggles—and how to help.
One skill, or many?
Scientists call this ability "cognitive control. " (2) Without it, we would simply act on automatic pilot. With it, our behavior becomes flexible and aimed at what we want to achieve.
The question of whether control is one thing or several has a long history. Part of the answer comes from the brain itself. The prefrontal cortex is not one uniform blob—it has many distinct sub-regions, each with its own wiring and connections to the rest of the brain.
So researchers wonder: does this brain region work as a single unit, or as a team of specialists that each handle different demands? (9)
Clues from the brain
One powerful way to answer this is to study people and animals with damage to specific brain areas. If harming one region hurts one skill but not another—and harming a different region does the opposite—that suggests the skills are truly separate.
And that's exactly what scientists found. Damage to certain lower-front parts of the brain hurt skills like holding back a response or being flexible. Other regions handled holding information in mind. These separate patterns argued strongly against control being just one single thing.
But there's a twist. Even skills that seem alike can split apart. Two different tests of "flexibility"—switching between rules versus relearning after a wrong answer—rely on different brain regions. One leans on the side of the prefrontal cortex; the other leans on a region just above the eyes.
The other side: unity
Yet control isn't only a collection of separate parts. There's also strong evidence for togetherness—what scientists call "unity.
When people do many different control tasks, brain scans show they often light up some of the same regions again and again. A frontal-and-parietal brain network, sometimes called a "multiple demand" system, gets involved across many kinds of demanding tasks.
At the heart of this unity may be a simple idea: holding onto a goal, and using that goal to guide what the brain pays attention to. Prefrontal goal signals let weaker, more deliberate choices win out over automatic habits when it counts.
Why this matters for Kabuki families
Here's where it becomes relevant to a wide range of conditions—Kabuki included. Difficulties with cognitive control appear across many different diagnoses, not just one.
Conditions involving attention, memory, and impulse control all share this common thread. Researchers increasingly find that disorders once treated as completely separate actually share a lot in common.
This shared vulnerability points back to the same brain networks. Many conditions show reduced activity in the frontal-parietal control network during demanding tasks. Understanding these networks may help guide future treatments.
Where the science is heading
The big takeaway is this: cognitive control has both unity and diversity. Some parts of it act together, and some parts act separately.
That mix likely explains why children with different diagnoses can share overlapping struggles while still each being unique. For Kabuki families, it offers a framework for thinking about a child's specific strengths and challenges.
The authors also stress the importance of genetics. Control abilities are strongly heritable, and different genes appear to influence different components of control. But the exact genes involved—likely acting through the prefrontal cortex—haven't yet been pinned down.
Developmental studies are expected to grow more important for understanding where these difficulties begin. And the prefrontal cortex and its networks will remain central to understanding these conditions—and to building new treatments.
• Twin and family study designs used to untangle whether control deficits and conditions like substance use share genetic roots.
• Genome-wide association studies linking executive functioning to GABAergic processes, and bioinformatic follow-ups to trace genetic pathways.
• The distinction between "hot" (emotional) and "cool" cognitive control, and how model-based, model-free, and "successor representation" strategies guide behavior.
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