Macrocephaly is the term for an unusually large head. An infant with macrocephaly will have a larger head than most other infants of the same age and sex. In many cases, this condition is benign or harmless. In other cases, it may indicate an underlying medical condition, such as a genetic syndrome or a brain tumor.
What causes a baby to have a big head?
Causes of macrocephaly include: Benign familial macrocephaly – other family members with big heads (inherited) Excess fluid in the brain – benign extra-axial fluid of infancy or hydrocephalus.
What does a large head circumference indicate?
Children with macrocephaly have a head circumference (the measurement around the widest part of the head) that is greater than the 98th percentile. Sometimes a large head means that there is a problem in the brain which might require surgery.
What does baby head size indicate?
Preliminary studies have shown that 1-year-old babies with bigger heads score higher on IQ tests later in life. And bigger heads do tend to hold bigger brains.
How big should a baby’s head be?
The average newborn’s head circumference measures about 13 3⁄4 inches (35 cm), growing to about 15 inches (38 cm) by one month. Because boys tend to be slightly larger than girls, their heads are larger, though the average difference is less than 1⁄2 inch (1 cm).
When should I be concerned about my baby’s big head?
The medical term for a large head is “macrocephaly.” Most of the time, it isn’t a serious condition, so parents don’t need to worry about it. In rare cases, however, it can be an indication that your baby has other health conditions. Learn more about macrocephaly and what it means.
Do autistic babies have large heads?
The brains of autistic children undergo an abnormal and dramatic growth spurt in the first year of their lives, according to a new study. The growth makes their heads markedly larger than those of normal infants.
Is having a big head genetic?
Benign familial macrocephaly is an inherited condition. It happens in families predisposed to having larger heads. Sometimes there is a problem with the brain, such as hydrocephalus or excess fluid. Underlying conditions will require treatment.
What disease makes your head big?
Macrocephaly is a condition in which circumference of the human head is abnormally large. It may be pathological or harmless, and can be a familial genetic characteristic. People diagnosed with macrocephaly will receive further medical tests to determine whether the syndrome is accompanied by particular disorders.
Is Macrocephaly a disability?
A rare, genetic, neurological disease characterized by association of macrocephaly, dysmorphic facial features and psychomotor delay leading to intellectual disability and autism spectrum disorder.
Are big head babies smarter?
The study found that babies with a head circumference of 12.5 inches to 14 inches were more likely to be smarter when they grew up. … Intelligence later in life was shown by achievements such as earning a college degree or scoring higher on verbal or numerical reasoning tests.
Are bigger babies more intelligent?
Experts have long known that premature or underweight babies tend to be less intelligent as children. But the study, published this week in the British Medical Journal, found that among children whose birth weight was higher than 5.5 pounds–considered to be normal–the bigger the baby, the smarter it was likely to be.
Does head size related to intelligence?
In healthy volunteers, total brain volume weakly correlates with intelligence, with a correlation value between 0.3 and 0.4 out of a possible 1.0. In other words, brain size accounts for between 9 and 16 percent of the overall variability in general intelligence.
What percentage of body weight does the head account for in newborns?
At birth the brain is typically 25% of its adult size, although the body weight of the newborn is only about 5% of adult weight (Stuart and Stevenson, 1950).