Questions and Answers
Sutures are formed by the articulation of two cranial bones.
sutures
Sutures are formed within _
a year or two of birth
Prior to suture formation, the cartilage-filled spaces between cranial bones are called _
fontanels
The _ is formed by the top and sides of the cranium.
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What is a sinus?
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What is a fossa?
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What are cranial fossae?
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What is a foramen?
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What is a septum?
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The _ forms the forehead.
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The _ forms the superior aspect of each eye socket.
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The _ forms the anterior cranial fossa.
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The _ articulates posteriorly with the parietal bones via the coronal suture.
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In the region just deep to the eyebrows, _ are present which allow nerves and arteries to pass.
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The _ bone contains the ______ sinus.
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Where is the glabella located?
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The two mirror-image bones which form much of the superior and lateral portions of the skull are the _.
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Which bones form the coronal suture?
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Which two bones form the sagittal suture?
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Which bones form the lambdoid suture?
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Which bones form the squamous suture?
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The _ suture is formed by the articulation of the parietal and frontal bones.
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The _ suture is formed by the articulation of the two parietal bones.
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The _ suture is formed by the articulation of occipital and parietal bones.
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The _ suture is formed by the articulation of parietal and temporal bones.
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The posterior and base of the skull is formed by the _ bone.
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What is the foramen magnum?
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What is the largest opening in the occipital bone?
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What are the openings called that cranial nerve XII leaves the skull through?
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What is the function of the occipital condyles?
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What are the external occipital protuberance and crest and nuchal lines?
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The two mirror-image bones which form the inferolateral aspect of the skull and part of the middle cranial fossa are the _ bones.
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The _ of the _ bone forms the posterior section of the zygomatic arch.
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The mandible articulates with which part of the temporal bone?
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The external acoustic meatus is the _ in the _.
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The hyoid bone is attached by ligaments to the _ of the _ bone.
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Study Notes
Cranial Structures
- Sutures: Formed by the articulation of two cranial bones, solidifying within the first two years of life.
- Fontanels: Cartilage-filled spaces between cranial bones before sutures form.
- Cranial Vault: Comprised of the top and sides of the cranium.
Bone Features
- Sinus: A cavity inside a bone that can impact air flow and pressure.
- Fossa: A depression or indentation, significant in housing and supporting brain tissues.
- Cranial Fossae: Depressions in the floor of the cranium that accommodate various neural structures.
- Foramen: A passage or opening through a bone for nerves and blood vessels.
Bone Divisions
- Septum: A dividing wall or structure within the anatomical framework.
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Frontal Bone:
- Forms the forehead and superior aspect of each eye socket.
- Constitutes the anterior cranial fossa and articulates posteriorly with parietal bones via the coronal suture.
- Contains superorbital foramina for nerve and artery passage and houses the frontal sinus.
- Parietal Bones: Two mirror-image bones forming the superior and lateral skull and articulating at the sagittal suture.
Sutures and Articulations
- Coronal Suture: Joint between the frontal and parietal bones.
- Sagittal Suture: Joint between the two parietal bones.
- Lambdoid Suture: Joint between the occipital and parietal bones.
- Squamous Suture: Joint between the parietal and temporal bones.
Occipital Bone
- Occipital Bone: Forms the posterior and base of the skull, featuring the foramen magnum, the largest opening allowing the spinal cord to exit the skull.
- Occipital Condyles: Allow articulation with the C1 vertebrae, facilitating head nodding.
- External Occipital Protuberance and Nuchal Lines: Sites for muscle and ligament attachment.
Temporal Bone
- Temporal Bones: Form the inferolateral aspect of the skull, comprising part of the middle cranial fossa.
- Zygomatic Process: A feature of the temporal bone that forms the posterior part of the zygomatic arch.
- Mandibular Fossa: Area where the mandible articulates with the temporal bone.
- External Acoustic Meatus: Canal leading to the eardrum, integral for hearing.
- Hyoid Bone: Suspended by ligaments from the styloid process of the temporal bone, pivotal for tongue movement and swallowing.
Nerve Pathways
- Hypoglossal Canals: Small openings lateral to the foramen magnum through which cranial nerve XII exits the skull.
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Description
Explore the fascinating details of cranial structures and bone features in this quiz. Learn about sutures, fontanels, and various bone divisions, such as the frontal bone and its significance. Test your knowledge on the anatomical aspects of the cranium.
