The vestibular system is one of those topics I keep coming back to — because it shows up everywhere. And when I explain it to parents and teachers, I see this moment of recognition: oh, that’s what’s happening. So I’ve taken care with this one, to make it as useful as possible for the OTs, teachers, and parents who want to understand the ‘why’ behind what they’re seeing.
Do you constantly lose your car in the shopping centre car park? (This is me, ha!) Or do you have a very good sense of direction? Are you the first one to sign up for skydiving and bungee jumping, or do you prefer hobbies where your feet are firmly planted on solid ground? As a kid, were you the one hanging upside down from the monkey bars, or were you happily playing in the sandpit, avoiding the swings?
If you answered yes to any of these, you have experienced your vestibular system at work.
It is one of the most critical systems for learning and emotional regulation — and often the least understood.
The Neuroscience simplified
The vestibular system is the brain’s internal GPS. Beginning to develop as early as 3 weeks after conception and functionally active by 8–9 weeks, it is the very first sensory system to develop — creating a secure map of where we are in space (it’s how we know which way is up and which way is down), and supporting our balance and coordination.
Located in the inner ear, it uses two distinct mechanisms to keep us balanced:
The Fluid Loops (Semicircular Canals): These detect rotation. When you spin or turn your head, fluid in these loops swirls around to tell your brain how fast you’re moving.
The Crystals (Otoliths): These detect gravity. Tiny crystals shift when you move in a straight line (like in a car) or tilt your head, giving you ‘Gravitational Security’ — the feeling that you are safe and grounded.
Want to geek out on the neuroscience? This video from Khan Academy does a beautiful job explaining the science further.
So why does this matter?
If a child experiences challenges in how their vestibular system receives and interprets information, they may be unable to truly ‘trust’ their body. When that physical trust is present, a child has a secure, safe base from which to explore their world.
But if those movement signals are getting mixed up, it creates cracks in that safe foundation — and triggers a domino effect that impacts higher-level skills.
For example: if a child cannot trust their balance, they have to work incredibly hard just to maintain their posture in a classroom chair. Because all their physical energy is going into simply sitting upright, it impacts their ability to stabilise their arm and hold a pencil. This cognitive load makes it exhausting just to pay attention to the lesson.
Vestibular system impact on posture & strength
The vestibular system helps regulate body posture. It sends a continuous signal down the spinal cord (via the Vestibulospinal Tract) to our ‘anti-gravity’ muscles, keeping them switched on automatically. It also works with proprioception to coordinate how we move.
Because this process is almost entirely subconscious, we shouldn’t have to ‘think’ about sitting up straight — our muscles likely just do it. If that vestibular signal is weak, however, the child may need to use conscious brain power just to hold themselves up, leading to increased physical and mental fatigue.
| What you might notice | Why? | Strategies to Support |
|---|---|---|
| Floppy / Leaning Body
The child slumps at their desk, leans on their hand while writing, slides off their chair, or constantly leans on furniture and people for support. |
Children don’t slump because they’re lazy or disengaged — their postural muscles simply aren’t getting a strong enough automatic signal to switch on. This isn’t a behaviour choice; it’s the body working twice as hard to do what most of us do effortlessly.
If the vestibular system is under-active, the ‘anti-gravity’ postural muscles have low tone. The child tires quickly because they’re working harder than everyone else just to stay upright — before they’ve even started the lesson. |
Environmental adaptations:
Children with low tone tire easily. Avoid wobble stools — instead, use a chair with arms or a high back, and ensure feet are flat on the floor. A stable base frees up cognitive load for learning. A theraband around chair legs adds movement input without removing support. Movement activities (grade to ‘just right challenge’): • Superman Pose (Prone Extension): Lie on tummy, lift arms and legs. Builds the core extension needed for sitting. |
| W-Sitting
The child prefers to sit on the floor with legs in a ‘W’ shape rather than cross-legged. |
This is actually a clever adaptation — the child’s nervous system has found the most stable base available. The W-position creates a wider base of support that requires less core stability and activation.
It can become a concern if it’s habitual, as it may limit the development of core strength over time. But correct the posture without addressing the underlying need and you’ve just made sitting harder. |
Avoid correcting with ‘sit properly’ — this creates stress without giving the child an alternative.
Instead, model and offer alternatives: criss-cross applesauce, side-sitting, or long-sitting with back supported. Let the child choose. Build core stability gradually using the movement activities above (Superman, therapy ball). These address the underlying need rather than the surface behaviour. If W-sitting is persistent and affecting motor development, flag for an OT assessment — it’s a useful clinical sign worth investigating. |
| Delayed Protective Reactions
The child falls often and fails to put their hands out in time, leading to more bumps and bruises than expected. |
The vestibular system is supposed to alert the brain instantly that the body is falling, triggering the ‘Protective Extension’ reflex — arms shooting out — before impact.
In these children, that signal is delayed. By the time the brain responds, the fall has already happened. This is not clumsiness — it’s a timing issue in the sensory-motor loop. |
This is worth flagging to an OT. In the meantime:
• Reduce fall risk in the environment (mats, avoiding height activities without support). |
Emotions & the survival response: what, why & how to support
The vestibular system connects directly to the brain’s emotional centre (the Limbic System). This connection underpins what sensory integration pioneer Dr. A. Jean Ayres called “Gravitational Insecurity” when it goes wrong — and its positive counterpart: the fundamental sense of trust that we are safe and grounded. Ayres described children with gravitational insecurity as feeling a “primal threat in the pull of gravity.” The inverse of that — gravitational security — is the foundation of emotional stability: if you cannot trust the ground beneath you, you cannot feel safe enough to explore the world.
If a child lacks this trust, their brain may interpret safe movements as dangerous. A simple action, like tipping their head back to wash their hair, might trigger panic or a Fight or Flight response.
| What you might notice | Why? | Strategies to Support |
|---|---|---|
| Fear of Movement
The child may: • Refuse to jump, hop, or use swings |
From the outside, this can look like anxiety or defiance. From the inside, the child is responding to what their brain is telling them — and their brain is telling them the movement is genuinely dangerous.
These children have a low threshold for vestibular input. Because their internal ‘gravity’ sensor is hypersensitive, a small tilt backward can trigger the same brain signal as falling off a cliff. They resist these positions to keep themselves safe. This isn’t a choice. It’s a survival response. |
Every child is unique. An OT can provide individualised support to help children engage in the activities they need and want to do.
Principles to guide your approach: • ‘Low and Slow’: Start with activities low to the ground and slow in speed. Linear (back-and-forth) movements like a rocking chair are more regulating than rotational ones. |
| Rigidity & Control
The child appears controlling during play, refusing to participate unless they set the rules. They may freeze or become rigid when moved unexpectedly. |
This is important to understand because labelling it as ‘bossy behaviour’ and trying to address it socially misses the real driver entirely.
By controlling the environment, the child is preventing unpredictable movements that would trigger a terrifying sensory reaction. It’s a coping strategy, not a character flaw. |
Always allow the child to control the pace and direction of movement. Stop immediately when asked.
Build predictable routines — structure reduces the brain’s threat response by letting the child anticipate what’s coming. When you understand the ‘why’, this child’s behaviour shifts from ‘difficult’ to ‘doing their best with a nervous system that needs more support.’ |
The Eyes (reading & writing): What, Why & How
You might be surprised to learn that the vestibular system also has a strong impact on your eye muscles. The vestibular system sends messages directly to the motor neurons that control eye movement — acting like a camera stabiliser, keeping our visual field steady even when our head moves.
Without this connection working well, the eyes struggle to ‘hold’ an image while the head is moving. This leads to poor visual tracking, which can significantly affect a child’s day:
• When reading, they may constantly lose their place or accidentally skip lines.
• When copying from the board, looking up then back down causes them to lose visual focus — making writing slow and frustrating.
• They may struggle to track a moving ball while running, appearing clumsy during sports.
| What you might notice | Why? | Strategies to Support |
|---|---|---|
| Reading & Writing Difficulties
The child may: • Lose their place while reading |
The vestibular system acts like a camera stabiliser, keeping our visual field steady when our head moves. Without this connection working well, the eyes struggle to ‘hold’ an image while the head is in motion.
Instead of smooth video, the child’s vision is shaky or blurry — like trying to film while running. So when they look up at the board and back down at their page, they lose their place. Every time. To cope, they may lock their eyes and move their whole head instead (poor dissociation), or use intense concentration to focus — leading to rapid fatigue. What looks like inattention is often exhaustion. |
1. Environmental Adaptations (to reduce daily load):
• Provide a printed desk copy of board notes — removes the up-down tracking demand entirely. 2. Movement Opportunities (to build the skill): Think of this like video game levels. Don’t jump to Level 3 if Level 1 isn’t mastered. • Start: Sitting on the floor, tracking a slowly rolling ball. Grade activities for that ‘just right challenge’ — a little harder than comfortable, but not overwhelming. |
A Note on Safety: Vestibular input is powerful. Always follow the child’s lead and stop immediately if you notice signs of distress — paleness, sweating, nausea, or hiccups. These activities are general suggestions and should not replace advice from your healthcare provider. When in doubt, start slow, keep it simple, and consult a GP or Occupational Therapist for a personalised plan.
Final thoughts…
Navigating sensory differences can feel complex, especially when the behaviour you’re seeing is confusing or exhausting. But when you understand the vestibular system — really understand it — something shifts. The child who can’t sit still, who won’t go on the swings, who falls without catching themselves, who copies everything so slowly… they’re not difficult. They’re working harder than you can see.
That’s what I hope you take from this. Not a checklist of deficits to watch for, but a new lens. When you look through it, you start to see the effort behind the behaviour — and that changes how you respond.
Start small, keep it fun, and watch their confidence grow. And if you’re ever unsure, bring in an OT. That’s exactly what we’re here for.
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