Neck — MCQs

Q: Which of the following muscle is not innervated by the nerve shown in the image?

Thyrohyoid. ***Thyrohyoid*** - The **thyrohyoid muscle** is unique among the infrahyoid muscles as it is innervated directly by the **hypoglossal nerve (CN XII)** via a branch that contains fibers from the **C1 spinal nerve**. - Unlike the other infrahyoid muscles, which receive innervation from the **ansa cervicalis** (C1-C3), the thyrohyoid receives its motor supply independently via the hypoglossal nerve pathway. *Omohyoid* - The **omohyoid muscle** (both superior and inferior bellies) is innervated by the **ansa cervicalis**. - It belongs to the group of infrahyoid muscles responsible for depressing the hyoid bone during swallowing and speech. *Sternohyoid* - The **sternohyoid muscle** is a superficial infrahyoid muscle innervated by the **ansa cervicalis**. - It works to depress the hyoid bone, helping to stabilize it during activities such as speaking and deglutition. *Sternothyroid* - The **sternothyroid muscle** is an infrahyoid muscle that is also innervated by the **ansa cervicalis**. - It serves to depress the larynx (thyroid cartilage) following elevation during the act of swallowing.

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Neck — MCQs

Neck — MCQs

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