Tuberculum sellae the raised anterior margin of the

This preview shows page 5 - 7 out of 11 pages.

Tuberculum sellae The raised anterior margin of the pituitary fossa. Anterior clinoid process A smooth projection from the posteromedial border of the lesser wing that gives attachment to the tentorium cerebelli. Sphenoidal conchae Two curved plates of bone that form the anterior wall and part of the floor of the sphenoidal sinus, and carry the entrance to it. They also mark the posterior extent of the nasal cavity. Articulations The sphenoid bone articulates with 12 bones: the vomer, ethmoid bone, frontal bone, occipital bone, two parietal bones, two temporal bones, two zygomatic bones, and two palatine bones. FACIAL BONES There are fifteen facial bones, six of which are paired and three of which are single. They articulate with the cranial bones but do not contact the brain. They give attachment to the muscles of facial expression and mastication, contain the teeth, and contribute to the nasal and orbital cavities. Two maxillae Two zygomatic bones Two palatine bones Two lacrimal bones Two nasal bones
Two inferior nasal conchae One vomer One mandible One hyoid bone MAXILLA The paired maxillary bones support the teeth of the upper jaw and contribute to much of the skeleton of the upper face. Alveolar process A projection that extends inferiorly from the body of the maxilla and supports the teeth within their bony sockets. Palatine process A projection that extends horizontally to form most of the hard palate. Incisive canal A passage formed by the union of the palatine processes that transmits the greater palatine artery and nasopalatine nerve . Zygomatic process A projection that extends laterally from the body and articulates with the zygomatic bone. Infra-orbital canal A passage that transmits the infra-orbital nerves and vessels . Infra-orbital foramen The anterior opening of the infra-orbital canal that transmits the infra-orbital nerves and vessels . Maxillary sinus The largest of the paranasal sinuses, it is located in the maxilla body and communicates with the nasal cavity through the maxillary hiatus . Articulations Each maxilla articulates with nine bones: the frontal bone, ethmoid bone, contralateral maxilla, and ipsilaterally, the nasal bone, zygomatic bone, lacrimal bone, inferior nasal concha, palatine bone, and vomer. ZYGOMATIC BONE The two zygomatic bones form the skeleton of the cheeks and the inferior and lateral walls of the orbit. Temporal process A projection that forms the prominent zygomatic arch by articulating with the zygomatic process of the temporal bone. The zygomaticotemporal nerve also traverses this section of the bone. Zygomaticofacial foramen An opening located on the lateral surface that transmits the zygomaticofacial nerves and vessels . Articulations Each zygomatic bone articulates with four bones: the frontal bone, sphenoid bone, and ipsilaterally, the temporal bone, and maxilla.

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture