What is thyrohyoid origin and insertion?

The thyrohyoid muscle is a small, flat muscle located in the neck region, which forms part of the infrahyoid muscle group. The muscle originates from the oblique line of the thyroid cartilage (larynx) and inserts into the hyoid bone.

The thyroid cartilage is the largest cartilage of the larynx, which forms the Adam's apple in males. The oblique line of the thyroid cartilage refers to an angle or ridge located on the side of the cartilage.

The hyoid bone is a U-shaped bone located in the neck region, which supports the tongue and provides attachment for several muscles associated with swallowing. The thyrohyoid muscle lies between the thyroid cartilage and the hyoid bone, and it helps to elevate and stabilize the larynx during swallowing and speaking.

The nerve supply to this muscle is from the first cervical nerve (C1) via the hypoglossal nerve. The blood supply comes from the superior thyroid artery. Dysfunction of the thyrohyoid muscle can cause difficulty swallowing, speaking, and breathing, and may lead to dysphagia, dyspnea, and voice disorders.