Talk:Sternothyroid muscle

Anatomy: Gross Mid‑importance

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The "actions/movements" subsections is partially wrong and unclear.

Hi :)

The wrong part comes for the claim that "When the hyoid bone is fixed, it instead elevates the larynx (producing an increased voice pitch)". This doesn't make sense with the attachments of the muscle. A muscle is brings the attachment points together. If both points are loose, the contraction brings both closer to each other, if one of the points is fixed and the other isn't then the loose point is brought closer to the fixed point.

Here the attachments are the sternum and the thyroid(part of the larynx). Due to the thyrohyoid membrane, the hyoid and thyroid are linked together. And as the thyroid is a part of the larynx, by extentension, the hyoid and larynx and linked together. Thus, when the hyoid is fixed, the thyroid is as well. And if the thyroid is fixed, then the sternum should be the end approaching the thyroid.

Which doesn't have anything to do with the raising of the larynx.

Please, let me know if I am wrong with anything :)

The unclear part is a critic of the way the other claim is presented.

"The sternothyroid muscle depresses the hyoid bone." Well, yes, but it does indirectly, by pulling the thyroid down, and as the thyroid is linked to the hyoid by means of the thyrohyoid membrane, the whole thing goes down.

Have a good day :) Lucasyata (talk) 06:40, 1 August 2024 (UTC)[reply]