Questions and Answers
What is the structure that lies above the nasal cavity and the two orbits?
Anterior cranial fossa
Which bone forms the floor of the anterior cranial fossa?
Ethmoid bone
Which bone presents the crista galli and the orbital plate in the anterior cranial fossa?
Frontal bone
What is the most probable diagnosis for a patient with severe headache, diplopia, redness, and swelling of one eye, with a history of an inflamed and septic boil in the upper lip?
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What is the function of the dural folds in the cranial cavity?
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Study Notes
Skull Structure
- The frontal bone lies above the nasal cavity and the two orbits.
- The frontal bone forms the floor of the anterior cranial fossa.
- The ethmoid bone presents the crista galli and the orbital plate in the anterior cranial fossa.
Clinical Diagnosis
- A patient with severe headache, diplopia, redness, and swelling of one eye, with a history of an inflamed and septic boil in the upper lip, likely has cavernous sinus thrombosis.
Cranial Cavity
- The dural folds in the cranial cavity separate the brain into compartments and support the brain's blood vessels.
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