The name “strap muscles” comes from their long and flat shape, similar to a belt or strap 3.
What are Prelaryngeal muscles?
The prelaryngeal musculature is divided in the midline from the hyoid bone to tracheostomy site and the anterior aspect the thyroid and cricoid cartilage dissected. The dissection at the posterolateral aspect of thyroid cartilage is minimal at this point (Figure 2).
What is Infrahyoid neck?
The infrahyoid region of the neck is located below the hyoid bone and contains the visceral, anterior cervical, posterior cervical, carotid, retropharyngeal, and perivertebral spaces. Some of these spaces are confined to the infrahyoid region; others continue into the suprahyoid region of the neck and the mediastinum.
What is the role of infrahyoid muscles during swallowing?
The infrahyoid muscles are responsible for the positioning of the hyoid bone along with the suprahyoid muscles. They play an active role in swallowing and the movement of the larynx. More specifically, all infrahyoid muscles (except the sternothyroid) depress the hyoid.
How many strap muscles are there?
There are four strap muscles: thyrohyoid: deep and lateral. omohyoid: superficial and lateral. sternohyoid: superficial and medial.
Is Sternocleidomastoid a strap muscle?
The neck strap muscles, a) The Sternohyoid (SH), Sternothyroid (ST), Thyrohyoid (TH) and the Sternocleidomastoid (SCM) muscles.
What is thyrohyoid muscle?
The thyrohyoid muscle is an infrahyoid muscle of the neck that is innervated by the ventral ramus of C1. The primary function of the thyrohyoid muscle is to depress and fix the hyoid bone and larynx though it may also raise the larynx when the hyoid bone is fixed.
What strap muscles overlie the thyroid gland?
Infrahyoid muscles are also known as “strap muscles” which connect hyoid, sternum, clavicle and scapula. They are located below the hyoid bone on the anterolateral surface of the thyroid gland and are involved in movements of the hyoid bone and thyroid cartilage during vocalization, swallowing and mastication.
What is the nerve supply of infrahyoid muscles?
Nerve supply
All of the infrahyoid muscles are innervated by the ansa cervicalis from the cervical plexus (C1-C3) except the thyrohyoid muscle, which is innervated by fibers only from the first cervical spinal nerve travelling with the hypoglossal nerve.
What is the hyoglossus muscle?
The hyoglossus muscle is one of the four intrinsic muscles of the tongue. It is a quadrilateral muscle that originates along the whole length of the hyoid bone and inserts into the side of the tongue. The hyoglossus acts to both depress and retract the tongue.
What is the danger space in the neck?
The danger space or alar space, is a region of the neck. The common name originates from the risk that an infection in this space can spread directly to the thorax, and, due to being a space continuous on the left and right, can furthermore allow infection to spread easily to either side.
Is the thyroid behind muscle?
Anatomy Overview
In its anatomic position, the thyroid gland lies posterior to the sternothyroid and sternohyoid muscles, wrapping around the cricoid cartilage and tracheal rings.
Where do you split a muscle strap?
The strap muscles may need transection if the gland is large. The muscles should be cut as high as possible as the nerve supply to these muscles (ansa cervicalis) is in the lower third [1–3].
What is the platysma muscle?
The platysma is a superficial muscle found in the neck. It covers most of the anterior and lateral aspect of the neck. The platysma is a broad muscle which arises from the fascia that covers the upper segments of the deltoid and pectoralis muscles.
