Updated: 10/21/26
Essential Points:
Balance is a team effort: Your eyes, the sensations from your body, and your inner ears constantly provide information that helps your brain keep you steady.
Your brain knows how to adapt: When one balance system becomes less reliable, your brain can often rely more heavily on the others to help maintain stability.
Balance can be challenged and trained: Changing things like lighting, standing surfaces, or head movements can challenge how your balance systems work together and help improve adaptability with appropriate practice.
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Balance is something most of us take for granted until it becomes difficult. But have you ever wondered what actually keeps you upright?
In this article, we're going to explore the three major sensory systems that help us maintain our balance. I'll keep things simple, provide a few real-world examples, and show you how these systems work together to keep us on our feet.
If something catches your interest, I've also included links to more detailed articles throughout. Enjoy!
What Controls Our Balance?
When you think of balance, what comes to mind? Do you picture standing on one foot like the Karate Kid? Maybe a tightrope walker carefully making their way across a dizzying height? Or perhaps you think about that unnerving feeling of almost falling?
Whatever comes to mind, ask yourself a simple question: What is balance?
Most of us have a pretty good understanding of balance, even if we can't explain it scientifically. We might describe it as the ability to stay upright, move without falling, or simply feel steady on our feet.
All perfectly reasonable answers!
But let's take that question one step further. What actually controls our balance?
When it comes down to brass tacks, we have three major sensory systems that help keep us upright. I like to think of them as the three big players on our balance team.
These are:
The visual system: Our eyes help us understand where we are in relation to the world around us.
The somatosensory system: Sensations from our skin, muscles, and joints help us understand where our bodies are and what we're touching.
The vestibular system: Located in our inner ears, this system helps us detect head movement and our orientation relative to gravity.
These three systems are constantly gathering information and sending it to our brains. Our brains then combine that information with our past experiences and coordinate appropriate muscle responses to help us stay balanced. (1)
And this process is happening all day long, usually without us giving it a second thought!
Of course, these systems aren't perfect. Sometimes one provides less reliable information, or it may stop functioning correctly altogether.
When this happens, our brains can often adjust by relying more heavily on the other systems.
For example, imagine someone who has recently lost their eyesight. Suddenly, they're missing a major source of information that previously helped them navigate their surroundings.
Initially, everyday activities like walking through an unfamiliar room may become considerably more challenging. However, with experience, appropriate training, and the use of other sensory cues, many people can adapt and become more confident moving through their environment.
The other systems don't magically become stronger overnight, and they can't replace everything vision provides. Instead, the brain learns new ways to make use of the information that's still available.
Pretty impressive, isn't it?
Now let's look at what makes each of these systems so important.
The Visual System
Let's start with the system you're probably most familiar with, your eyes!
Our visual system plays a tremendous role in balance because it allows us to see the environment around us and understand our position within it.
Think about walking through your home during the middle of the day. You can see the furniture, judge the distance to the doorway, and recognize that your child's toys are scattered across the floor.
Your brain uses this visual information to help guide your movements and avoid obstacles.
Now imagine making that same trip in the middle of the night with all the lights turned off. Suddenly, that familiar walk becomes a little more interesting.
Without clear visual information, you might slow down, reach for a wall, or take smaller steps. Your brain must now rely more heavily on information from your feet, joints, and inner ears to help you navigate.
This simple example demonstrates just how much our eyes contribute to our stability.
Unfortunately, our vision can change with age, injury, or medical conditions. Problems such as cataracts, reduced depth perception, or loss of peripheral vision can make navigating our environment more challenging.
And while some visual impairments can be corrected with glasses, treatment, or surgery, others may require us to adapt how we move through the world.
Interestingly, we can also purposely reduce visual information during balance exercises.
For example, standing with our eyes closed removes an important source of feedback. This encourages the brain to rely more heavily on information from the other two sensory systems.
Of course, this also makes the exercise more difficult, so it should only be attempted in a safe environment with appropriate support.
Our eyes do far more than help us appreciate a beautiful view. They're an essential part of keeping us on our feet.
For a deeper look at how our eyes contribute to balance, check out Your Eyes and Balance: How Vision Keeps You Steady.
The Somatosensory (Sensation) System
Of the three balance systems, I think this one might be the easiest to overlook.
The somatosensory system is responsible for collecting sensations from throughout our bodies, including touch, pressure, and information about the position and movement of our joints.
Essentially, it helps our brains understand what our bodies are doing and how they're interacting with the world.
Let's use one of my favorite examples.
Imagine you're hiking through the beautiful White Mountains of New Hampshire. As you make your way up the mountain, the trail becomes increasingly rocky. Your feet twist and turn over uneven surfaces, and you're constantly looking down to make sure you don't trip.
Then your hiking partner says, "Hey, look at that view!"
Naturally, you look up. But something interesting just happened.
While your eyes are busy admiring the mountains, your feet are still navigating the uneven trail. Fortunately, your somatosensory system is hard at work.
Your right foot lands on a rock, and your body senses how your ankle is positioned. Pressure receptors in your foot detect where you're making contact with the ground, while information from your muscles and joints helps your brain understand the position of your leg.
You then step onto another rock, except this one is covered in slippery moss. Uh-oh!
As your foot begins to slip, changes in pressure, joint position, and muscle activity help alert your nervous system that something isn't quite right. Before you've even had much time to think about it, your body may shift its weight, reach for support, or quickly take another step to regain balance.
Hopefully, you catch yourself, laugh about the close call, and continue enjoying your hike.
Now let's change one detail.
Imagine you have peripheral neuropathy, a condition that can reduce sensation in the feet.
Suddenly, some of the information your brain normally receives from the ground is missing or less reliable. You may have difficulty feeling exactly where your foot is positioned or recognizing subtle changes in the surface beneath you.
That slippery rock could become considerably more challenging to navigate, especially if you're looking up at the scenery instead of watching your feet.
Fortunately, your brain can still use information from your eyes, inner ears, and other parts of your body to help you maintain balance. However, the task may require more attention or different strategies.
And all of this happens in a matter of seconds.
Our somatosensory system really is an incredible network of information traveling between our bodies and brains.
So, how can we challenge this system?
One common approach is to change the surface we're standing on.
Standing on a firm floor provides relatively reliable information about our position. Switch to a soft foam pad, thick carpet, or uneven grass, and that information becomes less dependable.
Our brains must now work harder to interpret the changing sensations and combine them with information from our other balance systems.
This is one reason you might see balance exercises performed on foam pads or other unstable surfaces.
These challenges can help us practice adapting to different environments, although the best training approach depends on a person's abilities and goals.
The next time you're walking barefoot through the grass or navigating a rocky trail, think about how much information your body is gathering with every step.
Your feet are doing far more than simply carrying you around.
For a closer look, read Understanding the Somatosensory System and Its Role in Balance. You can also explore Understanding Proprioception to learn more about your body's remarkable ability to sense its own position.
The Vestibular (inner ear) System
Last, but certainly not least, we have the vestibular system. In my opinion, this is probably the most fascinating and complicated of the three balance systems.
Fortunately, you don't need to understand all the complicated anatomy to appreciate what it does.
Hidden deep inside each of your inner ears is a collection of tiny structures that help your brain understand how your head is moving and which direction gravity is pulling.
Think of this system as your body's built-in motion detector.
Have you ever spun around in a chair and felt dizzy when you stopped? Or turned your head quickly and noticed how your eyes stayed focused on what you were looking at?
Your vestibular system plays an important role in both experiences.
Inside each inner ear are three structures called the semicircular canals. These tiny, fluid-filled canals detect turning movements of the head.
When you turn your head to look over your shoulder, for example, these structures detect the movement and send information to your brain.
We also have two additional structures called the utricle and saccule. These help us detect straight-line movements and the position of our head relative to gravity.
So, whether you're riding in an elevator, turning your head, or tilting sideways, your vestibular system is helping your brain make sense of what's happening.
One of its most impressive jobs is helping keep our vision steady as our heads move.
Try looking at a stationary object across the room while gently turning your head from side to side. Notice how you can keep looking at the object even though your head is moving?
That's thanks in large part to a remarkable reflex involving your vestibular system and your eyes.
Of course, problems can develop within this system.
Conditions such as benign paroxysmal positional vertigo (BPPV), vestibular neuritis, or Ménière's disease may cause symptoms including dizziness, vertigo, or imbalance.
Some vestibular conditions respond particularly well to specialized physical therapy, while others require additional medical management.
Interestingly, head movements are also commonly incorporated into balance training.
For example, a therapist might have someone stand in a comfortable position and slowly turn their head from side to side.
That seemingly simple addition can make the task more challenging by increasing the demands on the vestibular system, vision, and the brain's ability to coordinate information.
It doesn't mean we're shutting off the vestibular system or overworking it until it stops functioning. Instead, we're practicing maintaining stability while the head is moving.
And as you might imagine, this ability is pretty important in everyday life.
After all, we shouldn't need to stop walking every time we want to look at something!
The vestibular system is an incredibly complex subject, and we've only scratched the surface here.
If you'd like to explore it further, check out Anatomy of the Vestibular System or take a deeper dive into Vestibular Physiology.
Final Thoughts: Three Amazing Systems
There you have it, a quick introduction to the three major sensory systems that help keep us balanced.
Our visual, somatosensory, and vestibular systems are constantly working together, sharing information with our brains, and helping us adjust to the world around us.
But here's one final point worth understanding. These three systems don't contribute equally to our balance all the time. Instead, our brains continually adjust how much they rely on each system depending on the situation. (2)
Think of it like three adjustable dials.
When you're walking down a well-lit hallway, your brain has plenty of reliable visual information to work with.
Turn off the lights, and that visual dial becomes less useful. Your brain must rely more heavily on the information coming from your feet, joints, and inner ears.
Now imagine standing on a soft, unstable surface. The information coming from your feet becomes less reliable, and your brain may place greater importance on your vision and vestibular system.
This incredible ability to adjust how we use sensory information is called sensory reweighting, and it's one of the many reasons our bodies can adapt to so many different environments.
It's also one reason balance training can be so much more interesting than simply standing on one foot.
By understanding these three systems, we can begin to appreciate why certain situations challenge our balance and how targeted exercise may help us become more adaptable.
So, the next time you walk across uneven ground, turn your head while moving, or find yourself stumbling through a dark room, remember that there's an incredible amount of teamwork happening behind the scenes. And most of the time, you don't even have to think about it.
And, if you're curious about how your brain decides which sensory information to trust, check out What Is Sensory Reweighting?.
What’s My Fall Risk Score?
Most people don’t notice their balance declining until something goes wrong.
This 10-minute self-assessment will show you:
• How stable your balance really is
• Where you're most at risk (strength, coordination, or falling ability)
• What to focus on first
No equipment. No guesswork. Just clear answers.
References
Horak FB. Postural orientation and equilibrium: what do we need to know about neural control of balance to prevent falls? Age Ageing. 2006;35(suppl 2). doi:10.1093/ageing/afl077
Peterka RJ. Sensorimotor integration in human postural control. J Neurophysiol. 2002;88(3):1097-1118. doi:10.1152/jn.2002.88.3.1097
