Has Your Brain Learned the Wrong Route? What Neuroplasticity Teaches Us About PPPD

One of the biggest misconceptions about Persistent Postural-Perceptual Dizziness (PPPD) is that if scans don't show a structural cause, the symptoms must be "just anxiety."

The research tells a very different story.

Over the past decade, neuroimaging studies have shown that people with PPPD have measurable changes in the way their brains process balance, movement, attention and sensory information. These findings are helping us move beyond the outdated idea that PPPD is either "physical" or "psychological." Instead, it is best understood as a disorder of brain networks and information processing.

The Brain Learns Through Experience

Think about driving to work every day.

After taking the same route hundreds of times, you barely need to think about it. Your brain has built an efficient pathway through repetition. This is neuroplasticity: the brain's remarkable ability to strengthen the connections it uses most often.

PPPD appears to develop in much the same way.

Following an initial event, such as vestibular neuritis, BPPV, vestibular migraine, concussion or a period of significant stress, the brain quite reasonably adopts a "survival route." It becomes more vigilant, relies heavily on visual information, stiffens posture and continuously monitors balance to prevent another frightening episode.

Initially, these strategies are protective.

The problem is that if they continue long after the original trigger has resolved, the brain begins practising this survival route every day. Eventually, it becomes the brain's default way of processing the world.

What Does the Research Show?

MRI studies have found subtle structural and functional differences in several brain regions involved in balance and spatial processing, including the hippocampus, prefrontal cortex, cerebellum and vestibular cortical networks (Indovina et al., 2015; Riccelli et al., 2017; Popkirov et al., 2021).

Researchers have reported:

• Reduced grey matter volume in areas involved in spatial navigation, executive functioning and sensory integration.

• Altered communication between brain networks responsible for balance, vision and attention.

• Increased activity in threat-monitoring and attentional networks, particularly when processing movement or visually complex environments.

  
  

Importantly, these findings do not suggest brain damage.

Rather, they are thought to reflect experience-dependent neuroplasticity. In other words, the brain has become highly efficient at predicting threat and prioritising safety behaviours.

Why This Matters for CBT and Vestibular Rehabilitation

This understanding changes the conversation completely.

CBT is not about convincing someone that they are "not dizzy."

Instead, it helps the brain gather new evidence.

Every behavioural experiment, every graded exposure and every reduction in safety behaviours teaches the nervous system something new:

"This movement is safe."

"I don't need to rely entirely on my vision."

"I can tolerate this sensation without danger."

Likewise, vestibular rehabilitation provides repeated opportunities for the brain to recalibrate how it processes balance information.

Together, CBT and vestibular rehabilitation are not simply managing symptoms. They are helping the brain build a new route.

The Message I Share With My Clients

I often explain it like this:

"Imagine your brain is like a sat nav. After a frightening dizzy episode, it found what it believed was the safest route. The trouble is that it keeps taking that same route, even when the danger has passed. Through repetition, the survival route becomes automatic.

CBT and vestibular rehabilitation don't erase the old route. Instead, they help your brain build a new one. At first, the new path feels unfamiliar, but with repeated practice it becomes stronger, easier and eventually becomes the brain's preferred route."

For me, this is one of the most hopeful messages within PPPD research.

The brain learned this pattern.

And because the brain is capable of lifelong neuroplasticity, it can also learn a healthier one.

References

Indovina, I., Riccelli, R., Chiarella, G., et al. (2015). Role of the insular cortex in persistent postural-perceptual dizziness.

Riccelli, R., Passamonti, L., Toschi, N., et al. (2017). Altered brain structure and functional connectivity in Persistent Postural-Perceptual Dizziness.

Popkirov, S., Staab, J. P., & Stone, J. (2021). Persistent Postural-Perceptual Dizziness (PPPD): A common, characteristic and treatable cause of chronic dizziness. Practical Neurology.