Your Child Has 8 Senses - Not 5. And the 3 You Don't Know About Are Running Their Behaviour

Sensory system

Here's a reframe that changes everything: when a child spins in circles until they fall, refuses to wear a certain shirt, melts down in a shopping mall, or slams every door they walk through, that's not bad behaviour. That's a sensory system sending urgent signals that the brain doesn't yet know how to manage quietly.

Most parents know about the five senses. What's far less understood is that humans, and children in particular, have eight sensory systems, and the three that rarely get mentioned in school are the ones most responsible for how children regulate themselves, learn, and connect with the people around them. When these systems are out of sync, behaviour is the first place we see it. The 8 Sensory Systems: A Primer

The Five Familiar Senses

The classical five, sight (visual), hearing (auditory), smell (olfactory), taste (gustatory), and touch (tactile), are the starting point. They process input from the outside world. What many parents don't realise is that the tactile system alone is deeply connected to emotional regulation: light, unexpected touch can register as threatening to a child's nervous system, while deep, predictable pressure often has the opposite effect.

Sense 6: Proprioception - The Body's Internal GPS

Proprioceptive receptors sit in the muscles and joints. They tell the brain where every part of the body is in space at any given moment — and how much force is being used to move it. You don't have to look at your hand to know it's reaching for a glass; that's proprioception at work.

For children, proprioceptive input is one of the most powerful regulators of the nervous system. Activities like climbing, carrying heavy objects, pushing against resistance, or kneading dough send information to the brain that supports focus, calm, and emotional stability. When a child crashes into furniture, squeezes others tightly, or chews on everything within reach, they are often self-regulating through proprioceptive input — not misbehaving.

Sense 7: The Vestibular System - Movement, Balance & Gravity

The vestibular system lives in the inner ear and tracks the body's movement through space, its orientation relative to gravity, and changes in speed and direction. It's the system that tells you whether you're moving or still, upright or tilted.

Vestibular input regulates arousal, which is why rocking tends to calm and fast spinning tends to excite. Children who seek constant movement (spinning, swinging, running when they could walk) are often feeding an underresponsive vestibular system. Children who panic on playground equipment or refuse escalators may have a system that over-registers movement input. The vestibular system also synchronises information between the visual and proprioceptive systems; when it's functioning well, coordination, reading, and emotional regulation are all easier.

Sense 8: Interoception - The Internal Landscape

Interoception is the most recent of the eight senses to receive serious clinical attention, and arguably the most important for understanding regulation and behaviour. It is the brain's awareness of what is happening inside the body: heart rate, hunger, thirst, body temperature, the need to use the bathroom, nausea, physical pain, muscle tension — and the bodily sensations that correspond to emotion (the tight chest of anxiety, the heat of anger, the heaviness of fatigue).

The American Occupational Therapy Association's 2023 position statement on sensory integration defines interoception as "one's ability to detect or register changes in internal organs through specific sensory receptors" — and recognises it as foundational to self-regulation and daily functioning (AOTA, 2023).

A landmark review published in the Australian Occupational Therapy Journal in 2025 documented statistically significant associations between interoceptive awareness and sensory processing, executive functioning, and activity participation in children, establishing interoception as a core domain, not a peripheral concern, for paediatric OT practice (Clark et al., 2025).

Crucially, research by Grist, Brown, Yu, and Clark (2024) found significant positive predictive relationships between sensory processing and interoceptive awareness in school-aged children - meaning the two systems influence each other bidirectionally, not in isolation (Journal of Occupational Therapy, Schools, & Early Intervention, 2024).

When interoception is underdeveloped or working differently, a child may not recognise they're hungry until they're in full meltdown, may not feel the need to use the bathroom until it's urgent, or may struggle to name what emotion they're experiencing, because the bodily signal that typically precedes and informs that emotion isn't being clearly registered. Atelier of Minds is a psychologist and OT-led, inclusive student care and enrichment centre in South Jakarta for children and young adults. Our team integrates occupational therapy, psychology, and developmental education to support every child's unique sensory and developmental profile.