Baby Brachycephaly vs. Plagiocephaly: Flat Head Types Explained

If your baby has a flat spot on their head, you may have heard terms like brachycephaly and plagiocephaly but aren’t sure what they mean or which one affects your baby. Understanding baby brachycephaly vs plagiocephaly is important because the two conditions have different causes, appearances, and treatment approaches. While both involve flattening of the head, baby brachycephaly vs plagiocephaly distinguishes between symmetrical flattening across the back of the head versus asymmetrical flattening on one side. This guide explains baby brachycephaly vs plagiocephaly in detail, helping you understand the differences, recognize which type your baby has, and know what treatment options are available.

Key Takeaways
– Baby brachycephaly vs plagiocephaly differs in pattern: brachycephaly is symmetrical flattening across the back, plagiocephaly is asymmetrical flattening on one side.
– Both conditions are common and usually caused by pressure on the developing skull.
– Treatment includes repositioning, tummy time, physical therapy, and in some cases helmet therapy.

Understanding Your Baby’s Skull

Before understanding baby brachycephaly vs plagiocephaly, it helps to know how a baby’s skull develops. A newborn’s skull is made up of several bone plates connected by flexible sutures and soft spots called fontanelles. This flexibility allows the skull to compress during birth and accommodates rapid brain growth in the first year of life.

Because the skull bones aren’t fused, they can be shaped by external pressure. When a baby spends a lot of time lying in the same position, the part of the skull that bears weight can flatten. This is called positional skull deformation.

What Is Baby Brachycephaly?

Baby brachycephaly refers to symmetrical flattening across the back of the head. The head appears wide and short from above, with the back of the head looking flat rather than rounded. Both sides of the head are affected equally.

Causes of Brachycephaly

Brachycephaly typically develops when a baby consistently lies on their back with their head turned to the side, putting pressure on the entire back of the skull. It’s common in babies who spend a lot of time on their backs, in car seats, or in other sitting devices.

Twins and multiples are at higher risk because they often lie facing each other, putting pressure on the back of their heads. Babies with torticollis are also at risk because they may keep their head in the same position.

Signs of Brachycephaly

The back of the head appears flat when viewed from the side. The head looks wide and short from above. Both ears may be pushed forward slightly. The flattening is symmetrical, meaning both sides are affected equally.

What Is Baby Plagiocephaly?

Baby plagiocephaly refers to asymmetrical flattening on one side of the head. The head appears parallelogram-shaped from above, with one side of the back flattened and the opposite side of the forehead bulging slightly.

Causes of Plagiocephaly

Plagiocephaly develops when a baby consistently turns their head to one side, putting pressure on one part of the skull. It’s commonly associated with torticollis, where tight neck muscles cause the baby to prefer looking in one direction.

Plagiocephaly can also be present at birth due to positioning in the womb, especially in twins or when there’s limited amniotic fluid.

Signs of Plagiocephaly

One side of the back of the head is flat. The ear on the flattened side may be pushed forward. The forehead on the flattened side may bulge slightly. The head looks asymmetrical from above, like a parallelogram. The face may appear slightly asymmetrical if the condition is severe.

Baby Brachycephaly vs Plagiocephaly: Key Differences

Understanding baby brachycephaly vs plagiocephaly helps you identify which type affects your baby and what approach to take.

Pattern of Flattening

Brachycephaly affects the entire back of the head symmetrically. The head looks flat from behind and wide from above.

Plagiocephaly affects one side of the back of the head. The head looks asymmetrical from above and slightly twisted from behind.

Cause

Brachycephaly is usually caused by consistent pressure on the back of the head from lying in the same position.

Plagiocephaly is often caused by a preference for turning the head to one side, frequently associated with torticollis.

Appearance

Brachycephaly: Head appears wide and short. The back is flat. Both sides are equal.

Plagiocephaly: Head appears asymmetrical. One side is flat, the other is rounded. The ear and forehead on the flat side may be displaced.

Treatment Approach

Both conditions respond to repositioning and tummy time, but plagiocephaly associated with torticollis also requires physical therapy to address neck tightness. Helmet therapy may be recommended for moderate to severe cases of either condition.

Treatment Options for Flat Head Syndrome

Treatment depends on the type, severity, and your baby’s age.

Repositioning

Change your baby’s head position during sleep. Alternate the direction your baby faces in the crib. Move toys and interesting objects to the side your baby doesn’t prefer to encourage turning. Hold your baby more and reduce time in car seats, swings, and other devices that put pressure on the head.

Tummy Time

Supervised tummy time strengthens neck, shoulder, and back muscles while taking pressure off the back of the head. Start with short sessions and gradually increase duration. Aim for at least 60 minutes of tummy time spread throughout the day by 3 months of age.

Physical Therapy

If torticollis is contributing to flat head syndrome, a pediatric physical therapist can teach you stretching exercises and positioning techniques. Physical therapy addresses the underlying neck tightness that causes the head preference.

Helmet Therapy

For moderate to severe flat head syndrome that doesn’t improve with repositioning and physical therapy, helmet therapy may be recommended. A custom-fitted helmet gently guides skull growth into a more symmetrical shape. Helmet therapy is most effective between 4-12 months of age when the skull is still growing rapidly.

Helmets are typically worn 23 hours per day for 2-6 months. Regular adjustments ensure the helmet continues to guide growth effectively.

Natural Resolution

Mild cases of flat head syndrome often improve naturally as babies start sitting up, crawling, and spending less time on their backs. By age 2, most cases have resolved significantly, though some mild asymmetry may persist.

Prevention Strategies

Preventing flat head syndrome involves varying your baby’s position and reducing time spent lying on the back.

Vary Positions

Alternate the direction your baby faces in the crib. Change positions during feeding. Hold your baby in different positions throughout the day.

Limit Container Time

Reduce time in car seats, swings, bouncers, and other devices that put pressure on the back of the head. Use these only when necessary.

Increase Tummy Time

Start tummy time from day one, even if only for a few minutes at a time. Gradually increase duration as your baby tolerates it.

Carry Your Baby

Wearing your baby in a carrier or holding them reduces pressure on the head and promotes normal skull development.

When to Seek Professional Evaluation

Contact your pediatrician if you notice a flat spot on your baby’s head, asymmetry in head shape, preference for looking in one direction, or limited neck movement. Early evaluation allows for early intervention, which leads to the best outcomes.

Your pediatrician will assess the type and severity of flattening, check for torticollis, and recommend appropriate treatment. They may refer you to a physical therapist or a specialist in cranial orthotics.

Frequently Asked Questions

Is flat head syndrome serious?

Flat head syndrome doesn’t affect brain development, but severe cases can cause facial asymmetry and may require helmet therapy. Early intervention prevents complications.

Can flat head syndrome be corrected?

Yes, most cases improve with repositioning, tummy time, and physical therapy. Moderate to severe cases may need helmet therapy, which is highly effective.

Does flat head syndrome affect brain development?

No, positional flat head syndrome doesn’t affect brain development. The brain continues to grow normally.

How long does helmet therapy take?

Helmet therapy typically lasts 2-6 months, depending on severity and the baby’s age. Early treatment leads to faster results.

Can flat head syndrome be prevented?

Yes, varying positions, increasing tummy time, and limiting container time can prevent flat head syndrome.

Conclusion

Baby brachycephaly vs plagiocephaly differs in pattern: brachycephaly is symmetrical flattening across the back of the head, while plagiocephaly is asymmetrical flattening on one side. Both are common, usually caused by pressure on the developing skull, and respond well to repositioning, tummy time, and physical therapy. Moderate to severe cases may benefit from helmet therapy. If you notice a flat spot on your baby’s head, have it evaluated by your pediatrician. Early intervention leads to the best outcomes, and most babies develop normal head shape with appropriate care.

Medical note: This article is educational and does not replace individualized medical advice. Contact your child’s clinician for evaluation and treatment.