HEALTH EDUCATION Lecture Notes - Lecture 1: Infrahyoid Muscles, Inferior Thyroid Artery, Ansa Cervicalis

• School: Kerala University of Health Sciences - KUHS
• Department: Public Health
• Course: HEALTH EDUCATION

Document Summary

The infrahyoid muscles are a group of four muscles that are located inferiorly to the hyoid bone in the neck. They can be divided into two groups: superficial plane omohyoid and sternohyoid muscles, deep plane sternothyroid and thyrohyoid muscles. The arterial supply to the infrahyoid muscles is via the superior and inferior thyroid arteries, with venous drainage via the corresponding veins. In this article, we shall look at the anatomy of the infrahyoid muscles their attachments, actions and innervations. The omohyoid is comprised of two muscle bellies, which are connected by a muscular tendon. The inferior belly of the omohyoid arises from the scapula. It is attached to the superior belly by an intermediate tendon, which is anchored to the clavicle by the deep cervical fascia. From here, the superior belly ascends to attach to the hyoid bone. Fig 1 lateral view of the infrahyoid muscles of the neck. The sternohyoid muscle is located within the superficial plane.