Automatic Postural Responses Explained

If you have read any of the condition guides on this site, you have seen the phrase "automatic postural responses" — it is repeated on almost every DMI page, from cerebral palsy to prematurity. This post explains what that term actually means, how the research says these responses normally develop, and why DMI is built around provoking them. It is an explainer about a mechanism, not a study of DMI outcomes.

What are automatic postural responses?

Automatic postural responses are the involuntary muscle adjustments your body makes to keep itself upright and stable against gravity. When a child loses balance and their body shifts weight, tightens a trunk muscle, or moves an arm to counter the lean, that correction is a postural response. "Automatic" means it is not a deliberate, thought-out action. It is produced below the level of conscious effort, the same way you stay standing on a moving bus without deciding to.

These responses have two jobs. The first is keeping the body's center of mass over its base of support so you do not fall. The second is keeping the head, trunk, and limbs in working relation to each other while a voluntary action happens — reaching for a cup, for example, only works if your trunk stays steady at the same time.

How they develop, according to the research

The most widely cited description of how these responses emerge in early life is Hadders-Algra's 2005 review in Neural Plasticity, which draws on decades of observing typically developing infants. It describes postural control as building up in two functional levels.

Level one is direction-specificity. From a very early age, often within the first weeks of life, an infant's muscles respond in a predictable way depending on the direction of the disturbance: forward, backward, or sideways. This direction-specific pattern is the backbone of postural control and appears to be a largely inborn property of the nervous system, present from birth in many infants.

Level two is fine-tuning. Over the first 18 months the infant learns to modulate those responses — how big, how fast, when to turn them off, and how to match them to the task. Hadders-Algra describes this second level becoming functionally active from around 6 months, when infants first develop the ability to adapt their postural activity to the specifics of a situation. That adaptation starts out crude. The review reports that subtler adjustment — varying the degree of muscle contraction — appears from 9 to 10 months, and that anticipatory postural adjustments, where the body braces before a movement instead of reacting after it, emerge around 13 to 14 months. The review identifies four transition points in all, at 3, 6, 9 to 10, and 13 to 14 months, and describes the change at 6 months as the major one.

There is also an early tendency to recruit muscles from the head downward rather than from the base of support upward. This one fades slowly, well past infancy: the review reports the head-downward pattern still dominating during reaching in sitting until 18 months, during balance disturbances in sitting until somewhere between 30 months and 3 years, and during walking until 7 years of age.

The shape of this timeline matters for parents: the basic wiring is early and largely automatic, but the fine control takes practice against gravity through the first year and a half. That is the window in which an intervention like DMI is meant to be influencing the system.

What this does and does not tell you about DMI

DMI's core description — that therapy provokes an active antigravity response and withdraws support as the child improves — is a direct application of this developmental picture. The reasoning is that if postural responses are built through repeated, graded challenge, then deliberately and repeatedly provoking them should encourage the nervous system to refine them, especially in a young brain.

Be clear about what this source is. It is a review of typical motor development. It is not a study of DMI, it does not measure whether DMI produces faster or better postural control than another approach, and it says nothing about how children with motor delays respond to DMI specifically. In other words, it supports the logic behind the technique, but it is not evidence that the technique works. No published outcome research on DMI currently exists; the completed trial comparing it to the Bobath approach has not yet released results.

You should also know that there are children for whom any antigravity challenge is unsafe. DMI states it cannot be used with children who have osteogenesis imperfecta or any other brittle bone condition, and the condition guides on this site list other precautions — recent surgery, hip instability, cardiac or respiratory diagnoses, and more. A therapist should ask about these before your child's first session.

What it means for your child

If your child has a motor delay, "automatic postural responses" is the precise name for what a DMI therapist is looking for when they say a child is "working on balance" or "holding against gravity." When a provider tells you DMI targets automatic postural responses, they are naming a specific, measurable system — the same one researchers study when they describe how typically developing infants come to sit, stand, and walk.

It also gives you a way to think about progress. Because these responses are automatic rather than deliberate, a child is not "thinking harder" about them. Gains come from repeated, graded challenge, one reason DMI sessions are structured the way they are — many exercises, with support reduced only as control improves.

What to ask or do with this information

When you talk to a provider, you can ask them to connect the everyday language to the mechanism. A few concrete questions:

• "Which specific postural responses are you working on with my child — direction-specific patterning, fine-tuning, or both?"
• "How will I recognize that an automatic response is improving, and how will you measure that?"
• "What would tell you this approach is not producing progress in my child specifically?"

You can also ask about the developmental window. Hadders-Algra's review describes the first 18 months as a major period of fine-tuning, which is part of why early referral is often emphasized. DMI's own published material describes the approach as improving the gross motor skills of children from birth. If your child is past that window, that is not automatically disqualifying — but it is reasonable to ask a provider how their goals and expectations change for an older child.

Finally, keep the distinction between mechanism and evidence in view. A therapist who can explain exactly which postural responses they are provoking is being specific and knowledgeable. That is different from claiming DMI is proven to work better than what your child is already doing. No published outcome research supports that claim. You can hold both ideas at once: the mechanism is plausible, and the proof is still pending.

Where it appears on this site

The phrase "automatic postural responses" is the mechanism described across this site. It is central to the what is DMI? overview and the guide to cerebral palsy, and it is repeated on the guides for Down syndrome, hypotonia, and premature babies. Understanding this one term gives you the vocabulary those pages assume.

Sources

• Hadders-Algra M. Development of postural control during the first 18 months of life. Neural Plasticity. 2005;12(2-3):99-108. PubMed and full text on PubMed Central
• Comparative Effects of Dynamic Movement Intervention and Bobath Approach on Neuromuscular Development in Spastic Cerebral Palsy. ClinicalTrials.gov identifier NCT07238634. Completed June 2026; results not yet posted.
• Dynamic Movement Intervention. Parent Resources and FAQ. DMI Therapy.