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Bontrager Chapter 11 Workbook And Self Test - JUST SKULL Cranial Anatomy and Bone Articulations 1. Bones Not Part of the Cranial Floor: - Occipital is not part of the floor of the cranium (correctly identified). 2. Frontal Bone: - The thin-walled aspect that forms the forehead is called the ...

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Bontrager Chapter 11 Workbook And Self Test - JUST SKULL
Cranial Anatomy and Bone Articulations

1. Bones Not Part of the Cranial Floor:

- Occipital is not part of the floor of the cranium (correctly identified).



2. Frontal Bone:

- The thin-walled aspect that forms the forehead is called the squamous part.

- Articulates with:

- Right parietal

- Left parietal

- Sphenoid

- Ethmoid



3. Widest Aspect of the Skull:

- Found at the parietal tubercles of two parietal bones.



4. Prominent Landmark of the Occipital Bone:

- External occipital protuberance (inion) is a notable bump.



### Articulating Bones

- Parietal Bone: 5 articulating bones

- Occipital Bone: 6 articulating bones

- Temporal Bone: 3 articulating bones

- Sphenoid Bone: 7 articulating bones

- Ethmoid Bone: 2 articulating bones



### Cranial Structures and Landmarks

1. Thickest and Densest Structure:

, - Petrous portion of the temporal bone.



2. Hypophysis:

- Another term for the pituitary gland (True; hypophysis cerebri).



3. Sphenoid Bone:

- Articulates with all other cranial bones (True).



4. Clivus:

- The shallow depression just posterior to the base of the dorsum sellae and anterior to the foramen
magnum.



5. Crista Galli:

- The small section located superior to the cribiform plate.



6. Left Sphenoid Fontanel in Adults:

- Termed the left pterion.



7. Squamosal Suture:

- Formed by the inferior junction of the parietal bones to the temporal bones.



8. Small, Irregular Bones in Skull Sutures:

- Sutural (Wormian) bones.



### Structures within Specific Bones

1. Sphenoid:

- Contains pterygoid hamulus, anterior clinoid processes, foramen ovale, and sella turcica.



2. Frontal:

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