Questions and Answers
How many separate bones make up the skull?
22
At what age does the development of the cranium stop?
12 years old
What type of joints join the bones of the cranium and face?
Fibrous joints
Where is the lambdoidal suture located?
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What is the function of the cranial bones?
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What is located at the junction of the coronal and sagittal sutures?
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Where is the anterior fontanel located?
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What is located at the junction of the parietal bone, squamosal suture, and greater wing of the sphenoid?
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What type of joint is a suture?
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How many facial bones are there?
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Which bone forms the forehead and the anterior part of the vault?
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What is the function of the crista galli?
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Where is the sella turcica located?
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What is the function of superior and middle nasal conchae?
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What is located in the center of the supraorbital margin?
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What structures correspond in position to the eyebrows located below the frontal eminences?
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What type of bone is the ethmoid bone?
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What is the location of glabella?
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What feature separates orbital plates of the horizontal portion of the frontal bone?
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What lies inferiorly from each side of the inferior surface of the body of sphenoid bone?
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Which suture is found between the frontal and parietal bones?
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At which point is the junction of the lambdoidal and sagittal sutures located?
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Where is the junction of the parietal bone, squamosal suture, and greater wing of the sphenoid located?
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What type of joint joins the bones of the cranium and face?
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Where are the anterior fontanels located?
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What is the function of the cranial bones?
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How many facial bones are there in total?
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0
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Where is the sella turcica located?
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What is the location of the sella turcica?
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What does the crista galli serve as an anterior attachment for?
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What is the function of the superior and middle nasal conchae?
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What lies inferiorly from each side of the inferior surface of the body of sphenoid bone?
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Where is the glabella located?
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What structures correspond in position to the eyebrows located below the frontal eminences?
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What is located in the center of the supraorbital margin?
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Which bone forms part of the roof of the nasal cavity, and the greater part of the anterior cranial fossa?
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What type of joint joins the bones of the cranium and face?
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What is located at the junction of the parietal bone, squamosal suture, and greater wing of the sphenoid?
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Study Notes
Skull Structure and Development
- The skull is made up of 22 separate bones.
- Development of the cranium typically stops by the age of 2 years.
Joints and Sutures
- Sutures are the type of joints that connect the bones of the cranium and face.
- The lambdoidal suture is located between the occipital bone and the parietal bones.
- Junction of the coronal and sagittal sutures is where the fontanel is found.
- The squamosal suture is located between the parietal and temporal bones.
Cranial Bones Functions
- Cranial bones serve to protect the brain, support the structures of the face, and house the inner ear.
- The crista galli serves as an attachment point for the falx cerebri, a fold of dura mater.
- Superior and middle nasal conchae function to warm and humidify inhaled air.
Fontanels and Features
- The anterior fontanel is located at the junction of the frontal and parietal bones.
- The supraorbital margin features the supraorbital notch or foramen, where the supraorbital nerve passes.
Bone Locations and Characteristics
- Ethmoid bone is classified as an irregular bone.
- The glabella is situated between the eyebrows, above the nasal bridge.
- The junction of the parietal bone, squamosal suture, and greater wing of the sphenoid bone is also known as the temporal fossa.
- Sella turcica is a saddle-shaped depression in the sphenoid bone, housing the pituitary gland.
Facial Bones
- There are a total of 14 facial bones in the human skull.
- The frontal bone forms the forehead and the anterior part of the cranial vault.
Additional Features
- Below the frontal eminences are structures corresponding to the eyebrows known as the supraorbital ridges.
- Below the body of the sphenoid bone lies the pterygoid processes, which extend inferiorly.
Summary of Joints
- The cranial and facial bones are primarily fixed by fibrous joints called sutures, allowing little to no movement.
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Description
Test your knowledge of the cranial and facial bones, including the sutures that join them, with this quiz on radiographic positioning and radiologic procedures for finals. Learn about the development of the cranium and face bones, and their distinct groups and characteristics.
