Q: Which part of the ethmoid bone attaches to the meninges?
head and neck anatomy, ethmoid bone, crista galli, Dental Hygiene Boards questions, prep questions, dental hygiene boards sample questions, mock exam, NBDHE, NDHCE, Local anesthesia, studentrdh

Q: Which part of the ethmoid bone attaches to the meninges?

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head and neck anatomy, ethmoid bone, crista galli, Dental Hygiene Boards questions, prep questions, dental hygiene boards sample questions, mock exam, NBDHE, NDHCE, Local anesthesia, studentrdh

(A). Cribriform plate
(B). Crista galli
(C). Superior and middle nasal conchae
(D). Hamulus

The ethmoid bone is small bone located in front of the sphenoid bone! Here is some information that are most important to know:

  • It consists of two masses, one on each side of the nasal cavity, which is joined horizontally by thin cribriform plates. These plates form part of the roof of the nasal cavity. Also, nerves (ethmoidal cells) associated with the sense of smell pass through tiny openings in them.
  • Portions of the ethmoid bone also form sections of the cranial floor, eye sockets, and nasal cavity walls.
  • A perpendicular plate projects downward in the middle from the cribriform plates to form the bulk of the nasal septum.
  • Crista galli is on the superior side of the ethmoid bone and is a wedge-shaped vertical midline plate that serves as an attachment for the meninges of the brain.
  • Delicate scroll-shaped plates called superior and middle nasal conchae project inward from the sides of the ethmoid bone toward the perpendicular plate.

Hamulus is a part of the sphenoid bone (and not the ethmoid bone). It is a small hook-like bone located inferior to the medial pterygoid plate.

Answer: (B). Crista galli

head and neck anatomy, ethmoid bone, crista galli, Dental Hygiene Boards questions, prep questions, dental hygiene boards sample questions, mock exam, NBDHE, NDHCE, Local anesthesia, studentrdh
Ethmoid bone

Head and neck anatomy for the dental hygiene board exams (NBDHE, NDHCE, CDCA, WREB, CRDTS) is NOT easy. The human body is extra complicated (for a good reason!) and gives us plenty to memorize.

I hope this helps you understandia little bit more about the ethmoid and sphenoid bone for the dental hygiene board exam (NBDHE, NDHCE, CDCA, WREB, CRDTS). StudentRDH has a fantastic chapter on Head and Neck Anatomy for the dental hygiene boards that could potentially help you understand this giant subject. It has condensed study guides with information tailored for the boards! Happy studying!

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(Disclaimer: StudentRDH is NOT affiliated with the NBDHE, NDHCE, CSCE, CDCA, WREB.)

Written by
Claire Jeong, RDH, MS
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