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TA2. 431. FMA. 75437. Anatomical terminology. [edit on Wikidata] A fontanelle (or fontanel) (colloquially, soft spot) is an anatomical feature of the infant human skull comprising soft membranous gaps (sutures) between the cranial bones that make up the calvaria of a fetus or an infant. [1]
The fontanelles are the diamond-shaped soft spots in between baby’s skull plates that haven’t yet joined together. These soft spots are covered in skin and protected by a layer of tough membranes.
Fontanelles, often referred to as "soft spots," are one of the most prominent anatomical features of the newborn's skull. Six fontanelles are present during infancy, with the most notable being the anterior and posterior fontanelles.
A fontanelle, fontanel, or soft spot is an anatomical feature of a baby’s skull. A baby has six fontanelles that consist of membranous tissue in the areas where certain adult skull sutures are found. Fontanelles allow the skull to pass through the birth canal and also provide a means of expansion as the brain grows.
Learn about anterior and posterior fontanelle closures, bulging and sunken fontanelles, and special considerations for premature babies from our experts.
Learn all about fontanelles, also known as a baby's soft spots, including what they are, how many there are, when they close, and how to care for them.
Key Terms. fontanelle: A fontanelle is a soft membraneous spot on the head of a baby due to incomplete fusion of the cranial bones. Superior view of infant skull: This image shows the location of the anterior (frontal) and posterior fontanelles.
Fontanelles are membranous areas that have not yet ossified in the developing cranial vault of neonatal and juvenile animals. Fontanelles allow for rapid stretching and deformation of the cranium as the brain expands faster than the surrounding bone can grow.
The soft parts of the newborn baby’s skull are known as fontanelles. While there are six fontanelles found in the skull of a newborn, only two are commonly known.
Fontanelles are gaps found between the individual bones of a newborn's skull. These gaps, also referred to as "soft spots," exist because the skull bones are not fused together at the time of birth. To fill these gaps, membranous connective tissue develops.