Parachute Reflex: Ages, Protective Reactions and How It Differs From Archaic Reflexes

The responses that appear after birth and stay for life

Hello to you, the movement professional,

The parachute reflex is a protective reaction: when the body tips over, the arms shoot out to cushion the fall. It appears after birth, forward at around 6 to 7 months, sideways at around 7 to 8 months, backward at around 9 to 10 months, and stays active for life. The RNP reading sees in it the speed of the vestibular and visual inputs.

In the gym, between two rotations, a young gymnast raises her arms above her head and tips forward without hurrying. Her palms land flat on the mat, her shoulders stack above her hands, her legs swing up to vertical. The smell of chalk, the mat creaking under the landings from the apparatus next door. Her coach, arms crossed, turns to us: "If the parachute reflex lasts for life, why don't her arms fly forward when she tips over?" This whole article revolves around his question.

A protective reaction is a rapid extension of the arms, sometimes accompanied by a step or a bending of the legs, triggered by a sudden displacement of the body out of its base of support. It belongs to the family of postural reactions, not to be confused with the archaic reflexes studied at birth.

Baby's parachute reaction: at what age does it appear?

The classic test of the parachute reaction is done with the baby held horizontally, belly down, then tipped head first toward a surface. The arms extend, hands open, as if to catch the fall. For the lateral and backward directions, you observe the seated child being gently unbalanced to the side or backward.

The landmarks in the table follow the orders of magnitude popularized by the motor development scheme of Milani-Comparetti and Gidoni, published in 1967. They vary from one child to another and from one source to another, so take them as windows, never as hard deadlines.

A parachute reaction that is absent beyond these windows, or clearly asymmetrical between the two arms, is a signal to bring to the pediatrician.

Righting, balance, protection: how are postural reactions organized?

During the first year, postural reactions settle in layer by layer. The righting reactions orient the head and then the trunk relative to gravity: the head seeks the vertical, the gaze the horizontal. The Landau reflex, which appears around 3 to 4 months, is part of them. Held in ventral suspension, the baby lifts the head and extends the trunk and legs, a bit like a little airplane. Despite its name, it ranks among the righting reactions, a family distinct from the archaic reflexes present from birth.

When the support surface moves without being left, it is the balance reactions that readjust the body: the trunk curves, the limbs spread out, the center of mass returns above the base. The protective reactions take over when balance is no longer enough and the fall becomes unavoidable.

Picture these three layers as nets stacked on top of each other. The first holds the head in place. Small perturbations are caught by the second, and the third comes into play only for the big ones. All life long, they work below awareness, and you only measure what they are worth on the day one of them is missing.

What is the difference between an archaic reflex and a postural reaction?

They are often confused, because both are tested on the baby and both sometimes carry the name "reflex." Their developmental trajectory, however, runs in opposite directions.

As the cortex holds them back, archaic reflexes fade from behavior; the mechanism is detailed in the article inhibiting or integrating an archaic reflex. Postural reactions, on the other hand, must stay lively and fast, and trying to "integrate" a protective reaction would make no sense. Which brings us back to the gymnast: if the reaction stays active, where does it go when she tips over?

Why the gymnast doesn't catch herself when she goes into a handstand

Because the fall is intended. When the gymnast goes into a handstand, her nervous system knows the trajectory, the speed and the place where the hands will land in advance. It prepares the movement before it even starts, through feedforward control: the command leaves with a prediction of what the senses will receive, and the body organizes itself upstream.

Anticipatory postural adjustments, also called anticipatory reflex stability, do a large part of the work here. Trunk bracing, shoulder placement, weight distribution: everything is set a few tens of milliseconds before the displacement. The tip that follows matches exactly what was planned, so the system has no reason to trigger the emergency response.

In an unexpected fall, it's the opposite. A foot slips, a contact pushes the body sideways, the ground gives way. The vestibular sensors detect an unplanned acceleration, vision registers a sudden scrolling, and the protective reaction fires within a fraction of a second. In an unexpected fall, the protective reaction is the last line of defense of the postural system. The same tip therefore produces two different responses, depending on whether it is anticipated or suffered.

The judo breakfall: a protective reaction you can train

Falling sports show that you can shape what the body does with this raw response. Left to itself, the protective reaction often throws a stiff, locked arm toward the ground, and the impact is concentrated at a single point: wrist and elbow absorb all the energy. Judo teaches the breakfall, or ukemi, from the very first sessions. Chin tucked, back rounded, and the whole forearm with the palm slapping the mat to spread the shock.

Feel the difference in your body. The reflex fall arrives like a sharp blow, a hard shock that travels up into the shoulder. With the breakfall, the body unrolls like a wave, the slap on the mat makes noise and the joints absorb almost nothing. The judoka keeps his protective reaction and adds to it a learned landing strategy, repeated thousands of times until it is available without thinking.

Same principle in rugby, wrestling, parkour or skiing: the original reaction brings the speed, and training gives it its form. What remains is to know how much of this speed depends on the senses, and how to read it in an athlete.

Protective reaction and athlete: what the RNP reading says

For the RNP reading, an athlete's protective reaction is read on two levels, its speed and its quality. Speed depends on how quickly the system detects the loss of balance. The vestibular system signals head acceleration, vision the scrolling of the environment, somesthesia the change of support. If one of these inputs arrives late or blurred, the response leaves late. The link between these three systems is developed in the article on the conflict between vision, vestibular system and proprioception.

On the quality side, we look at the orientation and symmetry of the response: arms going in the right direction, on both sides, with an appropriate amplitude. A response clearly slower on one side, or poorer with the eyes closed, points the reading toward a specific sensory input. Closing the eyes removes vision and leaves the vestibular system alone facing the tip, and the gap between the two conditions tells you the share of each sense.

The work follows the usual grid: read the input, test, stimulate, retest. A light, standardized perturbation, always under the same conditions and filmed, lets you compare from one session to the next. To understand how the vestibular system calibrates this response, gravity as the reference of posture extends the subject directly.

Faster protective reaction, fewer falls? The limits of the test

Nothing guarantees that a faster protective reaction on the test will translate into fewer falls in competition. Real situations mix fatigue, contacts, decisions and changing surfaces, and no test reproduces all of that.

One prediction remains testable. If the speed of the protective reaction depends on the vestibular and visual inputs, targeted work on the slowest input should reduce the gap between the eyes-open and eyes-closed conditions at the standardized retest. If that gap doesn't move, the reading will have to look elsewhere.

An intended fall is prepared upstream; when it is unexpected, it is the speed of the senses that decides the quality of the recovery.

👉 I want to be among the professionals who read the loop upstream.

Frequently asked questions about the parachute reflex

At what age does the parachute reflex appear in babies?

The forward parachute reaction generally appears around 6 to 7 months, the lateral reaction around 7 to 8 months and the backward reaction around 9 to 10 months. These landmarks, drawn notably from the Milani-Comparetti scheme, vary from one child to another.

Is the parachute reflex an archaic reflex?

It is classified among the protective postural reactions. Archaic reflexes are present at birth and come under cortical control, whereas the parachute reaction appears after birth and stays active for life.

What are protective reactions?

They are rapid extensions of the arms, sometimes accompanied by a step, that fire when the body suddenly leaves its base of support. They cushion the fall and take over from the balance reactions when these are no longer enough.

Is the Landau reflex an archaic reflex?

The Landau appears around 3 to 4 months and is classified among the righting reactions. It therefore belongs to the family of postural reactions, which appear after birth.

Why doesn't a gymnast stretch out her arms when she tips over on purpose?

Because the fall is intended and anticipated: the nervous system prepares the movement through anticipatory postural adjustments and detects no unplanned perturbation. The protective reaction is reserved for unexpected falls.

Is training an athlete's parachute reaction a form of care?

No. LabO RNP is neither medical nor paramedical, and is added as a complement to a care pathway, never in its place.

By the LabO RNP team