223094
| Question | Answer |
| Frontal Angle | is located at bregma |
| Sphenoidal angle | is located at pterion (where the sphenoid, parietal, temporal and frontal bones converge). |
| occipital angle | located at lambda (intersection of sagittal and lambdoidal sutures) |
| mastoid angle | is located at asterion (where the lambdoidal suture contacts the temporal bone). |
| parietal tuber (boss, eminence) | is the large, rounded eminence centered on the ectocranial surface of the parietal. It marks the center of ossification of the bone. |
| Temporal lines | dominate the ectocranial surface, arching anteroposteriorly |
| superior temporal line | anchors the temporal fascia (ectocranial anterior) |
| inferior temporal line | indicates the most superior extent of the temporalis muscle. (ectocranial anterior) |
| parietal foramen | when present, these holes are located close to the sagittal suture near lambda. It transmits a small vein through the parietal to the superior sagittal sinus. |
| parietal striae | these are striations, or "rays," that pass posterosuperiorly for some distance on the ectocranial surface of the parietal bone from their origin on its beveled squamosal edge. |
| meningeal grooves | formed by long association with the middle meningeal arteries, this structure dominates the endocranial surface of the parietals. These arteries supply the dura mater. The most anterior branch parallels the coronal edge of the parietal, and most of the branches traverse the bone toward its occipital angle. |
| sagittal sulcus | made when the parietals are articulated and the shallow grooves along the sagittal edge of each parietal combine along the endocranial midline. This sulcus is a posterior continuation of the same feature on the frontal bone. |
| Arachnoid foveae | concentrated endocranially along the anterior extent of the sagittal edge of each parietal. They are functionally equivalent to structures of the same name described for the frontal bone. |
| sigmoid sulcus | crosses the mastoid angle of the parietal, cutting a groove on the endocranial surface. It marks the course of the transverse (or sigmoid) sinus, a vessel that drains blood from the brain. |
| lambda | point at which sagittal and lamboidal sutures meet |
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