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skull /Facial bones/
skull projections
| Question | Answer |
|---|---|
| The skull consists of _________ bones | 22 |
| The skull is divided into the________ and the _________. | cranium, facial bones |
| What is the landmark that is located on the frontal bone between the eyebrows called? | Glabella |
| On either side of the glabella the frontal bone forms the superior portions of the . | Orbits |
| What is the large round hole in the anterior portion of the portion of the occipital bone called | foramen magnum |
| Which of the following us the opening to the ear canal and an important positioning landmark | External auditory meatus EAM |
| Which of the following are the palpable bones of the face, | maxilla, mandible, zygomas |
| Which of the following is the point, located at the junction of the nose and the upper lip and is a positioning landmark | Acanthion |
| Can be palpated as the prominence of the cheek | Zygoma |
| The only moveable bone in the face | mandible |
| Prominence in the center of the lower margin of the mandible and is a common positioning landmark | Mental protuberance or mental point |
| The following is the right angle formed by the contour of the inferior posterior ramus and is a common positioning landmark | Gonion |
| The mandibular condyle articulates with the mandibular fossa of the temporal bone to form the ? | Temporomandibular joint |
| The following are bones that make up the bony structure of the face | Vomer, lacrimal bones, palatine bones |
| air-filled cavities in the frontal, maxxilla, ethmoid, and sphenoid bones. | Paranasal sinuses |
| Following are thin curved bony projections that divide the nasal cavity, forming air passages lined with mucous membrane | Nasal conchae |
| Following is he largest paranasal sinuses | maxillary |
| The coronal and sagittal planes are adjusted by ______position and rotation of the head. | body |
| What is the SID used for a lateral projection of the skull | 40inch |
| For a PA axial (caldwell) of the skull, the central ray is ? | angled 15 degrees caudad to center of IR through nasion |
| following structures should be seen on a 15 degree caudad angle (caldwell) of the skull | petrus pyramids, frontal bone, outer contours of cranium |
| For AP axial projection (towne method) of the skull, the central ray is ______. | angled 30 degrees caudad to center of IR through the foramen magnum |
| Structures seen on a _____ are occipital bone, parietal bones, foramen magnum, petrous portions of temporal bones. | AP axial (Towne Method) Projection |
| Projection where the sagittal plane of the head is parallel to the IR and interpupillary line is perpendicular to it. | Lateral projection |
| Projections used when a patient is obese or injury makes if difficult to position the patient prone. | AP axial |
| Projections where the central ray angled 25 degrees cephalad to the center of the IR through a point 1.5 inches below external occipital protuberance . | PA axial (Haas method) |
| Projection done to demonstrate the structures of the cranial base more completely than they are seen with the Towne method. | Submentovertical |
| Projections performed for facial bones. | PA Axial (Caldwell) Parietocanthial (waters) Lateral |
| The structures seen on a PA axial projection of the facial bones are orbits, zygomatic bones, maxilla, nasal septum, and a portion of the __________. | Mandible |
| Projection where patient chin is resting on the table or upright Bucky | Parietocanthial (Waters) |
| The petrous portion of the _________should be projected beneath the maxillary sinus for the Waters Method. | Temporal bone |
| Projections that uses exposure factors similar to those used for a finger. | Lateral Nasal Bones |
| For a PA projection of the mandible the central Ray _______. | perpendicular to center of the IR |
| For an Axiolateral projection of the mandible the patients neck is extended somewhat and flexed laterally so that the sagittal plane of the skull forms a ___________ to the IR. | 15 degree angle |
| Projection used to demonstrate the mandibular condyles and temporomandibular joints. | AP Axial |
| Why should paranasal sinuses projections PA Axial , Parietocanthial, submentovertical, And lateral be done upright? | Demonstrate air-fill levels if present |
| Paranasal projection that demonstrates the maxillary and ethmoid sinuses? | Parietocanthial |
| Paranasal projection which demonstrates all of the paranasal sinuses, with right and left chambers superimposed on each other? | Lateral |
| Term for severe blow to the head which produces brain injury on the side opposite the location of the blow? | Contrecoup injury |
| Fractures often occur in pairs? | Mandible |
| Radiography of the head is most common today for what reasons? | Evaluation of bone disease in skull screening for facial fractures evaluation of the paranasal sinuses when CT not available |
| Movable bone of the face? | Mandible |
| Most common positioning line for alignment of the transverse plane between the midpoint of the lateral orbital margin and the EAM? | Orbitomeatal |
Created by:
mistiechris