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Questions and Answers
What is the primary function of the mastoid?
What is the primary function of the mastoid?
Which artery supplies blood to the occipital bone?
Which artery supplies blood to the occipital bone?
What type of bone is the temporal bone classified as?
What type of bone is the temporal bone classified as?
Which of the following is NOT a part of the occipital bone?
Which of the following is NOT a part of the occipital bone?
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What is one of the functions of the occipital bone?
What is one of the functions of the occipital bone?
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Which bone articulates with the Parietal bones?
Which bone articulates with the Parietal bones?
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What is one of the functions of the Frontal bone?
What is one of the functions of the Frontal bone?
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How many Parietal bones are present in the cranium?
How many Parietal bones are present in the cranium?
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Which artery supplies blood to the Frontal bone?
Which artery supplies blood to the Frontal bone?
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Which of the following is NOT a part of the Frontal bone?
Which of the following is NOT a part of the Frontal bone?
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What type of bone is the Frontal bone classified as?
What type of bone is the Frontal bone classified as?
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Which bone does the Frontal bone NOT articulate with?
Which bone does the Frontal bone NOT articulate with?
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How many total bones make up the cranium?
How many total bones make up the cranium?
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Study Notes
The Cranium
- The cranium is the skull's part containing the brain.
- There are eight bones in the cranium.
Bones of the Cranium
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Frontal (1): A flat bone at the front of the cranium; articulates with parietal, ethmoid, lacrimal, maxillae, nasal, zygomatic, and sphenoid bones; has squamous, orbital, and nasal parts; the middle meningeal artery supplies blood; protects the frontal lobe of the brain; assists with facial expressions.
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Parietal (2): Flat bones forming the top and sides of the cranium; articulates with frontal, temporal, occipital, and sphenoid bone; the middle meningeal artery supplies blood; protects the brain.
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Temporal (2): Irregular bones forming the lower sides of the cranium; articulates with parietal, occipital, zygomatic; the middle meningeal, posterior auricular, and stylomastoid arteries supply blood; protects the brain; contains the middle and internal parts of the ear; the styloid process anchors muscles associated with the tongue and larynx.
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Occipital (1): A flat bone at the back of the cranium; articulates with parietal, temporal, sphenoid bones, and atlas; the middle meningeal artery supplies blood; protects the brain; forms the foramen magnum.
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Sphenoid (1): A complex, bat-shaped bone forming part of the base and sides of the cranium; articulates with frontal, parietal, temporal, ethmoid, and occipital bones; the middle meningeal artery supplies blood.
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Ethmoid (1): A complex, spongy bone forming part of the base of the cranium and the orbit; articulates with frontal, sphenoid, vomer, palatine, and maxillae bones; the middle meningeal artery supplies blood.
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These eight bones are often referred as STEPOF (Sphenoid, Temporal, Ethmoid, Parietal, Occipital, Frontal).
Further Information
- A YouTube clip (https://www.youtube.com/watch?v=JSrpIczOPiE) provides additional information on skull anatomy.
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Description
This quiz explores the structure and bones of the cranium, which protects the brain. Learn about the eight bones that comprise the cranium and their individual features. Understand how these bones articulate and their role in brain protection and facial expression.
