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Ch 12 Week 1 Skull
Bontrager's Chapter 12 Week 1 Review
Question | Answer |
---|---|
What is the total # of bones in the Cranium? What is the total # of Facial Bones? What type of bone is the Calvarium or Skull Cap? | There is 8 Cranial Bones. There are 14 Facial Bones. The Calvarium (or Skull Cap) is part of the Cranium. |
Which term describes the superior rim of the orbit? Of the inferior rim of the orbit? | The SupraOrbital Margin (SOM). The InfraOrbital Margin (IOM). |
Which line needs to be perpendicular to the IR for a true lateral of the skull? Which line needs to be perpendicular to the IR for a true lateral of the skull? Which line needs to be parallel? | The interpupillary line. The mid sagittal plane. |
Which groove is slightly above the superciliary ridge? | The SupraOrbital Groove (SOG). |
What is the area that is slightly superior to the eyebrows and above the bridge of the nose? It's generally the area where the glasses sit. | The Glabella |
What is the area that's located at the junction of the 2 nasal bones and frontal bone and is slightly inferior to the glabella. | The Nasion |
What are the soft tissue junctions of the eyelids called at the medial junction and the lateral junction? | The Inner Canthus is medial and the Outer Canthus is lateral. |
What is the large cartilaginous portion of the external ear? | The Pinna or the Auricle. |
What is the area where the superior portion of the Auricle attaches? What internal structure does it correspond to? | The Top of the Ear Attachment (TEA). It corresponds to the highest point of the Petrous Ridge. |
What bony landmark is about 1/4" lateral to the Outer Canthus? | The Mid Lateral Orbital Margin |
What 3 landmarks contribute to the base of the orbit? | The SOM (SupraOrbital Margin), the IOM (InfraOrbital Margin) and the Mid Lateral Orbital Margin. |
Which external landmark corresponds with the level of the Petrous Ridge? | The Top of the Ear Attachment (TEA). |
What is the name of the prominent landmark (or bump) found on the external surface of the Occipital Bone? | the Inion or the External Occipital Protuberance. |
Reid's Base Line is another name for which skull positioning line? | The InfraOrbital Meatal Line (IOML). |
What are the skull positioning lines (that were gone over in class) from top to bottom that connect to the EAM? Which facial landmarks do the connect to? | GML (GlabelloMeatal Line) Glabella, the OML (OrbitoMeatal Line) between mid lateral orbital margin and outer canthus, the IOML (InfraOrbital Meatal Line) infraorbital margin, the AML (AcanthioMeatal Line) Acanthion & MML (MentoMeatal Line) Mental Point. |
What is another name for the Circumference of the Orbital Margin? What is the posterior (interior) portion of the Orbital Margin? | The Base. The Apex. |