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Ch 12 Week 1 Skull

Bontrager's Chapter 12 Week 1 Review

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.
Created by: jamestkelley