Infrahyoid muscles

Infrahyoid muscles

The Infrahyoid muscles (pronunciation: /ˌɪnfrəˈhaɪɔɪd ˈmʌsəlz/) are a group of four muscles located beneath the hyoid bone in the neck. The term "infrahyoid" is derived from the Latin words "infra" meaning below and "hyoid" which refers to the hyoid bone.

Anatomy

The infrahyoid muscles include the following four muscles:

• Sternohyoid muscle
• Omohyoid muscle
• Sternothyroid muscle
• Thyrohyoid muscle

These muscles are responsible for the downward movement of the hyoid bone and larynx during swallowing and speech.

Function

The infrahyoid muscles play a crucial role in the mechanics of swallowing and speech. They assist in the depression of the hyoid bone and larynx, which is necessary for the opening of the esophagus during swallowing.

Clinical Significance

Dysfunction or injury to the infrahyoid muscles can lead to difficulties in swallowing, known as dysphagia, and changes in voice quality.

See Also

• Hyoid bone
• Suprahyoid muscles
• Swallowing
• Dysphagia

External links

• Medical encyclopedia article on Infrahyoid muscles
• Wikipedia's article - Infrahyoid muscles

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