Your Spine Knows Where It Is, or Does It? Scoliosis, Balance and Proprioception
When we think about scoliosis, we often think about what we can see: the curve of the spine, uneven shoulders, differences in the rib cage, or changes on an X-ray.
But movement depends on something we cannot see quite as easily: the brain's ability to know where the body is in space.
This sense is called proprioception, and research suggests it may work somewhat differently in some adolescents with idiopathic scoliosis.
What is proprioception?
Close your eyes and bend your elbow. Even though you cannot see your arm, you still have a pretty good idea of where it is.
That is proprioception.
Specialized sensory information from our muscles, joints and other tissues continually provides the nervous system with information about body position and movement. The brain integrates this information with input from the eyes and vestibular system to help us maintain balance, coordinate movement and make small automatic corrections throughout the day.
Most of this happens without us consciously thinking about it.
What does this have to do with scoliosis?
A systematic review and meta-analysis examined proprioception in adolescents with idiopathic scoliosis (AIS) compared with adolescents without scoliosis.
The review included 11 studies involving more than 1,100 participants.
Overall, adolescents with AIS demonstrated greater errors when attempting to reproduce certain joint or body positions. There was moderate-quality evidence for greater joint repositioning errors and lower-quality evidence for differences in detecting movement and in some measures of sensory processing.
In simple terms, some adolescents with scoliosis may be slightly less accurate at sensing and reproducing where parts of their body are positioned in space.
That doesn't mean someone with scoliosis has “poor coordination,” nor does it mean everyone with scoliosis has a proprioceptive problem. The differences identified in the research are group-level findings and may not apply equally to every individual.
Did altered proprioception cause the scoliosis?
This is where the research becomes particularly interesting, but also where we need to be careful.
We don't know.
Researchers have questioned whether differences in sensory processing and proprioception could contribute to the development of scoliosis, whether they develop partly as the body adapts to a three-dimensional spinal deformity, or whether both processes influence one another.
The current evidence cannot establish cause and effect.
A broader systematic review examining neurophysiology, balance and movement in AIS has also identified differences in areas such as sensory integration, spatial orientation and postural control. Together, this research suggests that scoliosis may involve more than the shape of the spine alone.
But it does not mean that scoliosis is simply a “brain problem” or that proprioceptive training can correct a spinal curve.
Why does this matter for rehabilitation?
Because rehabilitation is not simply about making muscles stronger.
Imagine asking someone with scoliosis to “stand straight.”
What does straight actually feel like to that person?
A posture that looks more symmetrical in a mirror may initially feel unusual. Likewise, learning a new spinal position, correcting trunk rotation or changing the way the rib cage and pelvis are organized requires the nervous system to recognize, reproduce and eventually control that new position.
This is one reason scoliosis-specific rehabilitation often involves more than conventional strengthening.
Depending on the individual, rehabilitation may incorporate:
active self-correction of the spine and trunk
visual feedback using mirrors
awareness of pelvic, rib-cage and spinal position
balance and postural-control exercises
repeated practice of corrected positions
breathing integrated with three-dimensional correction
gradually incorporating those corrections into everyday movement
The goal is not to consciously control every movement all day.
With practice, the aim is for improved positions and movement strategies to become easier to recognize, reproduce and use during everyday activities.
The mirror can be more than a mirror
This also helps explain why visual feedback can be useful during scoliosis rehabilitation.
A patient may initially believe they are centred while their trunk remains translated or rotated. Seeing the position in a mirror, correcting it with guidance, and then noticing how the corrected position feels provides the nervous system with additional information.
Over time, the patient can begin relying less on the mirror and more on their own internal sense of position.
It is essentially practice connecting:
What I see → what I feel → how I move.
Scoliosis is three-dimensional, and rehabilitation should recognize that
An X-ray remains extremely important for diagnosing and monitoring scoliosis. Cobb angle, skeletal maturity and curve progression all influence clinical decision-making.
But an X-ray does not tell us everything about how someone controls their body.
Two adolescents with similar curves can have very different strength, balance, body awareness, movement strategies and functional abilities.
That is why a comprehensive scoliosis assessment should look beyond the curve itself.
For physiotherapy, the question is not only:
“What does the spine look like?”
It is also:
“How well can this person sense, control and use their body?”
The emerging research around proprioception gives us another piece of that puzzle, and another reason scoliosis rehabilitation should be individualized, active and focused on more than simply strengthening the back.
References
Lau, K. K. L., Law, K. K. P., Kwan, K. Y. H., Cheung, J. P. Y., Cheung, K. M. C., & Wong, A. Y. L. (2022). Timely revisit of proprioceptive deficits in adolescent idiopathic scoliosis: A systematic review and meta-analysis. Global Spine Journal, 12(8), 1852–1861.
Pialasse, J.-P., et al. (2024). Neurophysiological, balance and motion evidence in adolescent idiopathic scoliosis: A systematic review. European Journal of Physical and Rehabilitation Medicine.
