What the 2025 UCLA Research Actually Found

Baker and colleagues at UCLA published a review in Developmental Cognitive Neuroscience that examined how puberty shapes the brain. Their core finding? Puberty doesn't just change a teen's body — it triggers a cascade of changes inside the brain that make it more adaptable than it will ever be again in adulthood.

Three specific processes kick in during this window:

1. Synaptic pruning — the brain trims away connections it no longer needs so the ones it keeps become faster and more efficient.

2. Myelination — the brain builds a protective coating around its most important neural pathways, making signals travel faster.

3. Neural reorganization — the brain actively restructures its networks to handle more complex thinking, decision-making, and social navigation.

Together, these three processes create a window of heightened neuroplasticity. And the key word is window — it's time-limited, not permanent. Right now, your teen is in it.

The Part Parents Find Most Frustrating Is the Part Being Shaped Most

The prefrontal cortex — responsible for planning, decision-making, impulse control, and regulating behavior — stays highly plastic all the way through mid-adolescence into the mid-twenties. That means the very part of the brain that parents often feel most frustrated by (the impulsivity, the mood shifts, the attitude) is also the part that is most actively being shaped right now.

It's the last region of the brain to fully develop. And that's actually good news.

Why This Changes Everything About FND

Here's where it gets exciting for FND families. The same plasticity that made a teen's nervous system vulnerable to getting stuck in a heightened state — producing symptoms like pain, fatigue, brain fog, and functional episodes — is the exact same mechanism that makes the brain responsive to recovery.

What families I've worked with often see is this: the brain changed in one direction because of what it was repeatedly exposed to when the nervous system was on high alert. That same capacity for change means it can move in a different direction when the conditions shift.

This isn't false hope. It's neuroscience. The teen brain isn't broken. It's malleable — and that changes everything about how we approach recovery.

The Brain Doesn't Change in Isolation

The Baker paper is clear on this point: the brain changes in response to what it is repeatedly exposed to. Social interactions, the home environment, the quality of relationships — all of these directly influence how neural networks organize themselves during this window.

What gets fired repeatedly gets wired in. What a teen experiences consistently is what the brain builds toward.

This is why recovery isn't something that happens only in a clinic once a week or once every few months. It happens at home, every single day, through the quality of the environment a teen lives in.

Why Parents Are a Neurobiological Input

If environment is the lever for brain change, then the adults around the teen — and specifically the parents — are not peripheral to this process. You are central and essential to it.

Steady parent leadership is not a soft parenting skill. It's a neurobiological input for your child. When you show up consistently, when you regulate your own nervous system first, when you create a predictable and safe home environment — you're literally providing the conditions the brain needs to build new patterns.

What the researchers describe as "environmental enrichment" — a supportive, growth-oriented environment — actively promotes positive neural reorganization. That's the kind of reset your teen's brain actually needs to move toward recovery.

You're not waiting helplessly for your teen's brain to change. You don't have to delegate that change to someone else. You are one of the primary conditions that makes change possible.

What This Means for Your Family Right Now

This process isn't about micromanaging your teen or nagging them into wellness. It's about understanding that your steady, regulated presence is doing something powerful at the neurological level — whether you can see it in the moment or not.

If you want to learn more about how to create these conditions and support your teen's recovery from FND, visit teenfndacademy.com to learn how Dr. Lee's structured coaching program is helping families move from survival mode to real, lasting progress.

References

• Baker, A. E., Galvan, A., & Fuligni, A. J. (2025). The connecting brain in context: How adolescent plasticity supports learning and development. Developmental Cognitive Neuroscience, 71, 101486. View study