The frontal suture (sutura frontalis) is a dense connective tissue structure that divides the two halves of the frontal bone of the skull in infants and children. It usually disappears by the age of six, with the the two halves of the frontal bone being fused together. If it does not disappear it may be called a "metopic suture" or "sutura frontalis persistens." This may manifest as a keel-shaped deformity of the skull called "trigonocephaly." Connective tissue is any type of biological tissue with an extensive extracellular matrix and often serves to support, bind together, and protect organs. ... The frontal bone (os frontale) is a bone in the human skull that resembles a cockle-shell in form, and consists of two portions—a vertical portion, the squama, corresponding with the region of the forehead; and an orbital or horizontal portion, which enters into the formation of the roofs... A Hippopotamuss skull A skull, or cranium, is a bony structure of Craniates which serves as the general framework for a head. ... Cephalic disorders are congenital conditions that stem from damage to, or abnormal development of, the budding nervous system. ...
"Frontal Suture." Stedman's Medical Dictionary, 27th ed. (2000).
Moore, Keith L. and T.V.N. Persaud. The Developing Human: Clinically Oriented Embryology, 7th ed. (2003).
Categories: Skeletal system | Human anatomy | Head and neck | Skull
Below the frontal eminences, and separated from them by a shallow groove, are two arched elevations, the superciliary arches; these are prominent medially, and are joined to one another by a smooth elevation named the glabella.
The superior surface is convex, and marked by depressions for the convolutions of the frontal lobes of the brain, and faint grooves for the meningeal branches of the ethmoidal vessels.
The frontal articulates with twelve bones: the sphenoid, the ethmoid, the two parietals, the two nasals, the two maxillæ, the two lacrimals, and the two zygomatics.
The squamosal suture arches backward from the pterion and connects the temporal squama with the lower border of the parietal: this suture is continuous behind with the short, nearly horizontal parietomastoid suture, which unites the mastoid process of the temporal with the region of the mastoid angle of the parietal.
In or near the occipitomastoid suture is the mastoid foramen for the passage of the mastoid emissary vein.
In the frontoethmoidal suture are the anterior and posterior ethmoidal foramina, the former transmitting the nasociliary nerve and anterior ethmoidal vessels, the latter the posterior ethmoidal nerve and vessels.
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