Thyrohyoid muscle

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Thyrohyoid muscle
Thyrohyoid muscle.PNG
Muscles of the neck. Lateral view. (Thyrohyoideus labeled center-left.)
Thyrohyoideus.png
Muscles of the neck. Anterior view. (Thyrohyoideus visible center-left.)
Details
Origin Thyroid cartilage of larynx
Insertion Hyoid bone
Artery Superior thyroid artery
Nerve First cervical nerve (C1) via hypoglossal nerve
Actions Elevates thyroid and depresses the hyoid bone
Identifiers
Latin Musculus thyrohyoideus
TA98 A04.2.04.007
TA2 2174
FMA 13344
Anatomical terms of muscle

The thyrohyoid muscle is a small skeletal muscle on the neck which depresses the hyoid and elevates the larynx.

Contents

This quadrilateral muscle appearing like an upward continuation of the sternothyreoideus. It belongs to the infrahyoid muscles group.

It arises from the oblique line on the lamina of the thyroid cartilage, and is inserted into the lower border of the greater cornu of the hyoid bone.

It is innervated by thyrohyoid branch of C1 nerve. This nerve branches from the first cervical nerve as it joins the hypoglossal nerve (12th Cranial Nerve) for a short distance. This is the only exception in the infrahyoid muscles, or strap muscles, that is not innervated by ansa cervicalis. [1]

Additional images

See also

Related Research Articles

Infrahyoid muscles

The infrahyoid muscles, or strap muscles, are a group of four pairs of muscles in the anterior (frontal) part of the neck. The four infrahyoid muscles are the sternohyoid, sternothyroid, thyrohyoid and omohyoid muscles.

Genitofemoral nerve

The genitofemoral nerve refers to a nerve that is found in the abdomen. Its branches, the genital branch and femoral branch supply sensation to the upper anterior thigh, as well as the skin of the anterior scrotum in males and mons pubis in females. The femoral branch is different from the femoral nerve, which also arises from the lumbar plexus.

Omohyoid muscle

The omohyoid muscle is a muscle that depresses the hyoid. It is located in the front of the neck, and consists of two bellies separated by an intermediate tendon. The omohyoid muscle is proximally attached to the scapula and distally attached to the hyoid bone, stabilising it. Its superior belly serves as the most lateral member of the infrahyoid muscles, located lateral to both the sternothyroid muscles and the thyrohyoid muscles.

Cervical plexus

The cervical plexus is a plexus of the anterior rami of the first four cervical spinal nerves which arise from C1 to C4 cervical segment in the neck. They are located laterally to the transverse processes between prevertebral muscles from the medial side and vertebral from lateral side. There is anastomosis with accessory nerve, hypoglossal nerve and sympathetic trunk.

Digastric muscle

The digastric muscle is a small muscle located under the jaw. The term "digastric muscle" refers to this specific muscle. However, other muscles that have two separate muscle bellies include the ligament of Treitz, omohyoid, occipitofrontalis.

Geniohyoid muscle

The geniohyoid muscle is a narrow muscle situated superior to the medial border of the mylohyoid muscle. It is named for its passage from the chin to the hyoid bone.

Common carotid artery One of the two arteries that supply the head and neck with blood

In anatomy, the left and right common carotid arteries (carotids) are arteries that supply the head and neck with oxygenated blood; they divide in the neck to form the external and internal carotid arteries.

Ansa cervicalis

The ansa cervicalis is a loop of nerves that are part of the cervical plexus. It lies superficial to the internal jugular vein in the carotid triangle. Its name means "handle of the neck" in Latin.

Sternohyoid muscle

The sternohyoid muscle is a thin, narrow muscle attaching the hyoid bone to the sternum. It is one of the paired strap muscles of the infrahyoid muscles, serving to depress the hyoid bone. It is innervated by the ansa cervicalis.

Sternothyroid muscle

The sternothyroid muscle, or sternothyroideus, is an infrahyoid muscle in the neck. It acts to depress the hyoid bone. It is below the sternohyoid muscle. It is shorter and wider than the sternohyoid.

The semimembranosus is the most medial of the three hamstring muscles. It is so named because it has a flat tendon of origin. It lies posteromedially in the thigh, deep to the semitendinosus.

Genioglossus

The genioglossus is one of the paired extrinsic muscles of the tongue. The genioglossus is the major muscle responsible for protruding the tongue.

Hyoglossus

The hyoglossus, thin and quadrilateral, arises from the side of the body and from the whole length of the greater cornu of the hyoid bone, and passes almost vertically upward to enter the side of the tongue, between the styloglossus and the inferior longitudinal muscle of the tongue. It forms a part of the floor of submandibular triangle.

Styloglossus

The styloglossus, the shortest and smallest of the three styloid muscles, arises from the anterior and lateral surfaces of the styloid process near its apex, and from the stylomandibular ligament.

Lingual artery

The lingual artery arises from the external carotid artery between the superior thyroid artery and facial artery. It can be located easily in the tongue.

Superior thyroid artery

The superior thyroid artery arises from the external carotid artery just below the level of the greater cornu of the hyoid bone and ends in the thyroid gland.

Temporal styloid process

The temporal styloid process is a process of bone that extends down from the temporal bone of the human skull, just below the ear.

Carotid triangle

The carotid triangle is a portion of the anterior triangle of the neck.

Muscular triangle

The inferior carotid triangle, is bounded, in front, by the median line of the neck from the hyoid bone to the sternum; behind, by the anterior margin of the sternocleidomastoid; above, by the superior belly of the omohyoid.

Pharynx

{{Infobox anatomy | Name = Pharynx | Latin = pharynx | Greek = φάρυγξ (phárynx) | Image = Illu01 head neck.jpg | Caption = Head and inner neck | Width = | Image2 = Illu_pharynx.jpg | Caption2 = Pharynx | Precursor = | System = | Artery = pharyngeal branches of ascending pharyngeal artery, ascending palatine, descending palatine, pharyngeal branches of inferior thyroid | Vein = pharyngeal plexus | Nerve = [[pharyngeal plexus of vagus nerve|pharyngeal plexus]], maxillary nerve, mandibular nerve | Lymph = | part_of = Throat | system = Respiratory system, digestive system }} The pharynx is the part of the throat behind the mouth and nasal cavity, and above the oesophagus and trachea – the tubes going down to the stomach and the lungs. It is found in vertebrates and invertebrates, though its structure varies across species.

References

This article incorporates text in the public domain from page 394 of the 20th edition of Gray's Anatomy (1918)

  1. Netter, Frank H. (2018). Atlas of Human Anatomy. Elsevier. pp. Table 2.9. ISBN   9780323393218.