The greater horn of the hyoid bone is formed by which arch?

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Study for the Pharyngeal Apparatus Test. Dive into multiple choice questions with detailed explanations and hints. Prepare effectively for your exam!

Multiple Choice

The greater horn of the hyoid bone is formed by which arch?

Explanation:
The greater horn is formed by the third pharyngeal arch. The hyoid bone develops from two arches: the second arch (Reichert’s cartilage) contributes the lesser horn and the upper part of the body, while the third arch provides the greater horn and the lower part of the body. This arrangement explains why the greater horn aligns with the lower regions of the hyoid and relates to the third arch’s derivatives, such as the stylopharyngeus muscle. The fourth arch mainly contributes to laryngeal cartilages and does not form the hyoid.

The greater horn is formed by the third pharyngeal arch. The hyoid bone develops from two arches: the second arch (Reichert’s cartilage) contributes the lesser horn and the upper part of the body, while the third arch provides the greater horn and the lower part of the body. This arrangement explains why the greater horn aligns with the lower regions of the hyoid and relates to the third arch’s derivatives, such as the stylopharyngeus muscle. The fourth arch mainly contributes to laryngeal cartilages and does not form the hyoid.

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