​Superior deep cervical lymph nodes are found attached to the upper part of the internal jugular vein. Infrahyoid, prelaryngeal and pretracheal lymph nodes lie beneath the deep cervical fascia and drain afferently from the anterior cervical nodes.

What does the Infrahyoid do?

Infrahyoid muscles: Together, the infrahyoid muscles play an active role in swallowing through the movement of the larynx. The omohyoid, sternohyoid, and thyrohyoid act to depress the hyoid bone. The thyrohyoid elevates the larynx whereas the sternothyroid depress the larynx.

What are considered infrahyoid muscles?

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.

How many infrahyoid muscles are there?

The four infrahyoid muscles are the sternohyoid, omohyoid, sternothyroid, and thyrohyoid muscles.

Where do superficial cervical lymph nodes drain?

superficial cervical glands Their afferent drain the lower parts of the auricular and parotid region, while their efferents pass around the anterior margin of the Sternocleidomastoideus to join the superior deep cervical glands.

What nerve Innervates infrahyoid muscles?

The ansa cervicalis (or ansa hypoglossi) is the union of the C1, C2, and C3 nerves from the cervical plexus, which provides innervation to the infrahyoid muscles (Figure 31.2).

What are Infrahyoid and suprahyoid muscles?

Infrahyoid muscles are below hyoid, while Suprahyoid muscles are labeled above. The suprahyoid muscles are four muscles located above the hyoid bone in the neck. They are the digastric, stylohyoid, geniohyoid, and mylohyoid muscles. They are all pharyngeal muscles, with the exception of the geniohyoid muscle.

What Innervates the Infrahyoid?

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 nerve Innervates the Infrahyoid muscle?

What is the function of the infrahyoid muscles?

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…

How many compartments are there in the infrahyoid neck?

The infrahyoid neck is divided into 5 major anatomical compartments or spaces by the various layers of the cervical fascia (2). These spaces are well recognized in the axial plane and therefore suited for analysis on axial CT or MR.

What are the surgical triangles of the infrahyoid neck?

Traditionally the anatomy of the infrahyoid neck has been subdivided into a group of surgical triangles whose borders are readily palpable bones and muscles (figure). These triangles have a cranial-caudal orientation and therefore are difficult to correlate with cross-sectional imaging.

What causes infrahyoid muscle paralysis?

Infrahyoid Muscles Paralysis. Trauma in the region of the cervical spine can damage the ansa cervicalis, resulting in paresis or even paralysis of the infrahyoid muscles. Clinically, those may be presented as swallowing difficulties, a hoarse voice and throat tightness. Incorrect positioning during surgery or medical interventions in…