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Questions and Answers
What is the number of movable bones in the skull?
What is the name of the joint that connects the mandible to the skull?
How many bones form the cranial cavity?
What is the name of the suture that runs between the frontal bone and the two parietal bones?
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What is the name of the point where the sagittal and lambdoid sutures meet?
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At birth, what occupies the area of the bregma?
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What is the name of the highest point of the skull?
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How many paired bones are there in the skull?
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What is the name of the bone that forms the posterior part of the skull?
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What is the name of the aspect of the skull that is studied by removal of the skull cap?
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Study Notes
Structure of the Skull
- The skull is formed of 22 bones, including one movable bone (mandible) and 21 immovable bones that articulate together by fibrous joints.
Parts of the Skull
- Cranium: the upper and posterior part of the skull that encloses the brain.
- Facial Skeleton: the anterior part of the skull, including an upper fixed part and a lower movable part (the mandible).
Aspects of the Skull
- Anterior aspect: Norma Frontalis.
- Superior aspect: Norma Verticalis.
- Lateral aspect: Norma Lateralis.
- Posterior aspect: Norma Occipitalis.
- Inferior aspect: Norma Basalis.
- Interior of the skull: Cranial Cavity, studied by removal of the skull cap.
Bones of the Skull
- 5 unpaired bones: frontal, ethmoid, sphenoid, occipital, and vomer.
- 8 paired bones: parietal, temporal, zygomatic, lacrimal, maxillary, nasal, palatine, and inferior conch.
The Vault of the Skull
- Formed by 4 bones: frontal, 2 parietal, and occipital.
- Sutures between the bones:
- Coronal Suture: runs transversely between the frontal bone and the 2 parietal bones.
- Sagittal Suture: runs in the median plane, connecting the 2 parietal bones.
- Lambdoid Suture: runs between the occipital bone and the 2 parietal bones.
Special Features of the Skull
- Bregma: the point of meeting between the sagittal and coronal sutures.
- Vertex: the highest point of the skull, located at the middle of the sagittal suture.
- Lambda: the point of meeting between the sagittal and lambdoid sutures.
- Frontal eminences: the most convex parts of the frontal bone, indicating the site of the ossification centers.
- Parietal eminences: the most convex parts of the parietal bones, indicating the site of the ossification centers.
- Parietal emissary foramen: one on each side of the sagittal suture, transmitting an emissary vein connecting the scalp veins with the sup. sagittal sinus.
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Description
This quiz covers the structure and composition of the skull, including its bones, parts, and aspects. Learn about the cranium, facial skeleton, and mandible.
