Why Do Rett Syndrome Children Hold Breath & Wring Hands?

If your child holds their breath or constantly wrings their hands, it is important to know that these actions are entirely involuntary and not behavioral. These hallmark symptoms of Rett syndrome happen because of profound changes in how the brain regulates automatic functions and controls movement. A genetic mutation in the MECP2 gene disrupts the way brain cells communicate, specifically affecting the brainstem (which controls breathing) ^[1] and the motor pathways (which control purposeful hand use) ^[2].

The Brainstem and Breathing Abnormalities

Watching your child pause their breathing or hyperventilate can be a terrifying experience. Rett syndrome causes widespread dysfunction in the autonomic nervous system—the part of the body that handles automatic, behind-the-scenes tasks like breathing, heart rate, and digestion ^[3].

Normally, a small area in the brainstem called the Kölliker-Fuse (KF) nucleus helps regulate a steady breathing rhythm by acting as a “brake” on the breathing cycle ^[1]. In children with Rett syndrome, the brain lacks certain inhibitory signals (known as GABAergic transmission) in this specific area ^[1]. Without these signals, the brain’s “brakes” fail to reset the breathing cycle properly ^[1]. This miscommunication leads to erratic breathing patterns while the child is awake, including hyperventilation, swallowing air, and prolonged breath-holding (apnea) ^[1].

Because the autonomic nervous system is involved, you might notice these breathing irregularities often disappear entirely while your child sleeps ^[3]. During waking breath-holding spells, a child might even turn blue (cyanosis) before the body’s natural reflexes kick in and they start breathing again. However, you should work closely with a pediatric neurologist or pulmonologist to create a personalized action plan so you know exactly when to simply monitor an episode and when to seek emergency care.

Hand Stereotypies and the Loss of Purposeful Use

The constant hand wringing, clapping, or washing movements seen in Rett syndrome are known as stereotypies. Just as the brainstem struggles to regulate automatic breathing, the parts of the brain responsible for planned, voluntary movement also experience severe communication issues ^[2].

Because of a lack of proper inhibition in the brain, these motor centers experience abnormal electrical activity or “noise” ^[2][4]. This interference makes it incredibly difficult for a child to coordinate the high-level signals needed to reach, grasp, or play with toys. As the brain loses its ability to suppress lower-level motor loops, purposeful hand movements are replaced by these repetitive, automatic stereotypies ^[2].

A Note on Seizures

Because children with Rett syndrome have a high risk of developing clinical epilepsy, it is crucial to understand that these stereotypies and breath-holding spells are distinct from epileptic seizures. Your neurologist may order a video EEG to ensure these movements are properly identified and managed, as clinical seizures require entirely different medical treatments.

What This Means for Your Child and Your Care Team

Understanding the “why” behind these symptoms can often provide families with a measure of comfort. Your child is not holding their breath or wringing their hands out of stubbornness or anxiety; these are deeply rooted neurological reflexes ^[2].

While these symptoms can be distressing to watch, a multidisciplinary care team can help optimize your child’s quality of life ^[5]. For example, occupational therapists can offer strategies—such as gentle guidance or the use of soft elbow splints—to protect the hands without causing frustration, rather than you feeling like you need to forcefully stop the movements. Neurologists and pulmonologists can help monitor breathing and ensure the heart and lungs remain healthy despite the erratic rhythms.