Parietal bones

Developmental Toxicity. No studies were located regarding developmental effects in humans after inhalation, oral, or dermal exposure to disulfoton or in animals after inhalation or dermal exposure. Developmental effects have been found in animals after acute- and intermediate-duration oral exposure to disulfoton. Plasma and erythrocyte cholinesterase depression and increased incidences of incomplete ossified parietal bones and sternebrae were observed in fetuses from rats fed... 

Molnar, Z. Development of the parietal bone of young mice. I. Crystals of bone mineral in frozen-dried preparations. J. Ultrastructal Res. 3, 39 (1959)... 

Cerebral blood flow (CBF) was monitored in the cerebral cortex of the ischemic hemisphere corresponding to the supply territory of the middle cerebral artery by laser-doppler flowmetry (DRT4, Moor Instruments, Devon, UK). To this aim, a rectangular bent laser-doppler probe was glued onto the parietal bone (2 mm posterior and 5 mm lateral from bregma) and local CBF was continuously measured from 20 min before the onset of ischemia until 10 min after reperfusion, keeping the animal under isoflurane anaesthesia. Flow values were collected every 5 min before MCAo and after reperfusion whereas data were collected at 10 min intervals during occlusion. 

Although this result strongly supports the hypothesis that reduced Msx2 function is responsible for familial parietal foramina in humans, one inconsistency is that in humans the defect is in the parietal bone, whereas in mice it is in the frontal bone... 

About a year afterwards I was again called to her on account of a pain, as violent as before, exa fly on the fiime part of the other parietal bone. On examining her mouth I found the fecond molaris of the under-jaw on the fide before alFe ed was now decayed, and concluded, that this tooth had occafioiied the ftroke ... 

The brain resides within the cranial cavity. The bony roof and sides of the cranial vault make up the calvaria, which is composed of frontal, temporal and parietal bones and a small portion of the occipital bone. The floor of the cranial vault is divided into three depressions or fossae the anterior fossa extends from the region superior to the orbits and nasal cavity caudaUy as far as the posterior margin of the lesser wing of the sphenoid the middle fossa occupies the region between the lesser wing of the sphenoid and the anterior border of the petrous portion of the temporal bone and the posterior fossa, is underlain by the remainder of the temporal bones and the occipital bone. 

In the infant skull accessory sutures and synchondroses can be mistaken for fractures. The most common locations for accessory sutures are intrapa-rietal, located within the parietal bone. Intraparietal accessory sutures may be unilateral or bilateral. In the acute situation, presence or absence of overlying soft tissue swelling is helpful in differentiating between fractures and accessory sutures. Sutures also tend to have less sharply defined margins and may... 

A number of experiments conclusively established that parathormone accelerates bone resorption. Bone resorption is observed after transplantation of parathyroids in contact with parietal bone or in tissue cultures of bone supplemented with parathormone. 

A 3 cm long mid-sagital incision was made through the skin and galea. The periosteum was elevated and an 8-mm diameter trephine craniotomy was made inunediately proximal to the coronal suture in the parietal bone, without dural involvement. The circular cranial plates were secured to the skull and the soft tissues were closed with 4-0 Vicryl suture using simple interrupted stitches. The skin wound was closed in a standard manner with staples. 

The free or inner concave border forms the tentorial notch, which surround the midbrain and is classically described as attaching to the anterior clinoid processes of the sphenoid. The attached or outer convex border is classically described as attaching to five areas the transverse ridge of the sulcus of the transverse sinus of the occiput, the posteroinferior angle of the parietal bone at the asterion, the mastoid portion of the temporal bone, the petrous ridge of the temporal bone, and the posterior clinoid process of the sphenoid. 

Parietals A small articulation exists at the pterion between the posterosuperior surface of the greater wing of the anterior inferior angle of the parietal bone. It is a squamous suture, allowing gliding motion. The sphenoid overlaps the parietal bone. 

The parietal bones articulate with five bones... 

Parietal The interparietal (sagittal) suture is serrate, allowing a rocking motion as the parietal bones rotate internally and externally. It has fewer but wider serrations posteriorly to accommodate greater motion there. 

FIG. 103-17 Sutures and articulations of the parietal bones of the skull, superior view. 

The inferior surface of the parietal bone moves laterally around an axis connecting the anterior and posterior bevel changes. The posterior surface moves more laterally than the anterior surface. 

Parietal bone relative external rotation on the side of the torsion. 

Parietal bones externally rotated on the convex side. 

Findings observed on osteopathic examination were compression of the occipital condyles bilaterally (the left side greater than right], left parietal bone externally rotated, right medial pterygoid muscle spasm, and an anterior sacral base. No bossing ofthe frontal and parietal bones was noted and there was no overlapping of sutures present. 

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