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A fontanelle (or fontanel) (colloquially, soft spot) is an anatomical feature of the infant human skull comprising soft membranous gaps between the cranial bones that make up the calvaria of a fetus or an infant. [1] Fontanelles allow for stretching and deformation of the neurocranium both during birth and later as the brain expands faster than ...
Only a comparatively small part of the head at term is represented by the face. The rest of the head is composed of the firm skull, which is made up of two frontal, two parietal, and two temporal bones, along with the upper portion of the occipital bone and the wings of the sphenoid. These bones are separated by membranous spaces, or sutures.
The open portion between the major bones of the upper part of the vault, called fontanelles, normally remain soft up to two years after birth. As the fontanelles close, the vault loses some of its plasticity. The sutures between the bones remain until 30 to 40 years of age, allowing for growth of the brain. Cranial vault size is directly ...
A molera (also known as a fontanel) is a "soft spot" on the top of a Chihuahua's skull; it is the equivalent to the bregmatic or anterior fontanelle in human babies, but unlike most mammals Chihuahua's fontanelle persist into maturity. Historically it has been very common amongst Chihuahuas and was regarded as a mark of purity for this ...
The anterior fontanelle (bregmatic fontanelle, frontal fontanelle) is the largest fontanelle, and is placed at the junction of the sagittal suture, coronal suture, and frontal suture; it is lozenge-shaped, and measures about 4 cm in its antero-posterior and 2.5 cm in its transverse diameter. The fontanelle allows the skull to deform during ...
Newborn baby immediately after birth, covered in vernix Vernix caseosa , also known as vernix , is the waxy white substance found coating the skin of newborn human babies . [ 1 ] It is produced by dedicated cells and is thought to have some protective roles during fetal development and for a few hours after birth.
The posterior fontanelle (lambdoid fontanelle, occipital fontanelle) is a gap between bones in the human skull (known as fontanelle), triangular in form and situated at the junction of the sagittal suture and lambdoidal suture. It generally closes in 6–8 weeks from birth. The cranial point in adults corresponding the fontanelle is called lambda.
Most primary ossification centers have appeared in the diaphyses of bone. Birth to five years Secondary ossification centers appear in the epiphyses five years to 12 years in females, 5 to 14 years in males Ossification is spreading rapidly from the ossification centers and various bones are becoming ossified. 17 to 20 years